Welcome to the penultimate chapter! As always, I hope everyone enjoys this. For those of you who would like an alternative to txt files, please note that I plan to collect the entire story when it's finished into a better type of document and I hope to include the amazing fanart I've received, as well. If you haven't seen the Same Difference work by EpicTits and TheMisterStupid on DeviantArt, then you're really missing out! There might just be some new stuff in the collected version, as well.

In the meantime, here is:

SAME DIFFERENCE
by tusdine

CHAPTER 15


"Sorry, Tara, you're gonna have to explain it again. It just doesn't make any sense."

The keyboard became quiet as Tara's fingers stopped moving and I heard her sigh. It wasn't a frustrated or annoyed sigh... it was concerned. "No, I'M sorry. My mind has been so busy, so noisy lately. It actually takes me quite a bit of effort to try and speak 'casually' now." She adjusted herself in her seat. Regular chairs were a distant memory for Tara's giant booty, so she was sitting on a piano bench - not that I could see the bench underneath her.

"Oh wow. Please don't strain yourself any more just to try and explain things to me, I know you're under a lot of pressure..."

Tara smiled politely. "It's perfectly fine, Jim. I do enjoy speaking with you, you know." She began typing for several seconds and then stopped again. "Okay. I'm going to try and explain it again, but I'll have to summarize it in a way that might sound a bit stranger than the truth."

"That's fine, I understand," I said. Even though I was standing next to her as she sat on the bench, she was almost the exact same height as me, and despite the situation we were in, it was difficult to avoid looking slightly down at her swelling, slightly-bigger-than-volleyballs breasts that were tightly encased in a tank top that exposed her entire midriff.

"Our bodies aren't simply inflating - we're growing new flesh, new nerve endings. That's why Kara and I can feel the growth even if we're not actively touching something or being touched. It's happening at a rate far beyond any normal growth, and it's an incredible strain on our brains, as well. Kara is experiencing this to an even greater degree on account of her considerable milk production."

I realized something. "Yeah, she was pumping when she started acting strangely earlier."

Tara resumed typing. Formulas far beyond anything I ever learned in school appeared on the screen faster than I could even read them. "Exactly. When you told me about the way she referred to herself in the plural sense, my suspicions were confirmed. As her senses were being overwhelmed while she pumped, her mind was having difficulty focusing... so she was self-identifying as her breasts. I'm sure she wasn't able to feel anything in the rest of her body at the time."

"So that's why she only wanted me to, uh, focus on her boobs. That's pretty crazy. Oh, no offense!"

"Don't worry," Tara chuckled. "I know how she feels, of course. The desire to have my growing body touched, and squeezed... and penetrated... it's... overwhelming."

Beads of sweat were forming on Tara's forehead and her typing had slowed. "Are you okay?" I asked in fear. The last thing we needed now was for Tara to get sick, or worse yet, to start losing her mind like Kara had been.

"Fortunately... my mind is strong enough to keep its focus. And it's not like I have to worry about the milk aspect." She turned her head towards mine. "It's... still a powerful feeling, though. Oh Jim, I'm such a bad sister."

"But you're doing everything you--" Tara's lips pressed into mine with an intense passion, so I naturally reciprocated.

"I might still be all here," Tara panted, "but there are these times when my pleasure is all I can think about. I feel terrible even entertaining the idea at a time like this..."

I took a deep breath and tried to think rationally. "If you can manage to focus on helping Kara, then try your hardest to make that happen. Otherwise, if you need to do anything to help you think better, then you know I'm right here."

The words had barely left my mouth before Tara wrapped her strong arms around me and pulled me closer. With her lips by my ear, she whispered "Thank you for understanding. I love you, Jim."

My heart skipped a beat as Tara moved her head back in front of mine and she bit her lower lip nervously. "I love you too, Tara."

What happened next? Well, it feels a bit strange going into the minute details, considering what the rest of my story has been like. There was a whole new dimension of passion between the two of us. It had been one thing to be lucky enough to even touch a woman as impossibly gorgeous and voluptuous as Tara, much less have sex with her, but to do it with these emotions behind it...

Before I knew it, we were on the floor, cushioned once again by Tara's enormous ass. This time, I was taking charge of the thrusting, but we both had our arms around each other and our kisses were long and passionate. Tara's nearly basketball-sized tits were squished between our chests as our lips struggled to connect. I unwrapped my arms from around her svelte midsection and pulled down the front of her tank top (well, Kara's old tank top) just enough to uncover her nipples. They were now about the size of quarters in diameter and almost an inch long, and they stood out even greater with the neck of the tank top being hooked under them.

Tara gasped when I moved my head down to flick my tongue over one nipple, then the other. I traced the upper, uncovered, border of her two-inch wide areola with my tongue until she pressed the back of my head into her heavy breast. The nipple popped right into my mouth and I began gently sucking it - it was incredible, and I realized that I had never had a chance to do this before with breasts of that particular size, due to Kara's first growth spurt. Despite being a fraction of the size of Kara's current breasts, Tara's were thrilling in their own way. They were easily on the upper end of what a very rare "normal" woman could develop, if not somewhat past that, and those women didn't have the rest of Tara's physique nor her marvelous breast shape.

It was easily the slowest we had made love, but each motion felt more powerful than ever. While I wanted the moment to last as long as possible, the small, rational part of my brain knew that this wasn't the time to forget about what was going on with Kara. At least I knew that we would have more time later.

When we had finished, Tara started cleaning up quickly. "I'm sorry to rush, but it's best that I get back to helping Kara."

"No, I understand. And, uh, about Kara..."

"I know how you feel about her, too," Tara said with a wide smile. "And it's fantastic. I wouldn't have it any other way. Now I have to try and save her mind so you can tell her yourself!"

Tara continued working late into the night. She practically demanded that I get some sleep because I was only distracting her, and I figured that was a good idea because we were expecting company the next morning. Not long after Tara learned about Kara's condition, she suddenly told me to call Emily and tell her to come by the house in the morning for a "final interview". Sleep didn't come easy to me as I was anxious about how Emily would react upon meeting the twins.

When I went downstairs the next morning, I found Tara still hard at work writing and erasing chemical equations on her large whiteboard. She still looked stunning despite having been up all night, due to her incredible genetics. At that point I realized that I didn't know if the girls' practically effortless looks were due to the modifications made by their father before their birth, or due to alterations made by Tara later in life, or some combination of both. I realized that I had never seen either twin's lips with a "normal" coloration - not that they always looked like they were wearing vibrant lipstick as if they were going clubbing, but their lips always appeared to have more subtle lipstick applied. And other parts of their faces, as well - now that I had actually stopped to think about that instead of their massive breasts and butts, I was realizing that they always had a slight blush and slightly thicker eyelashes compared to regular women. One of my first girlfriends had laughed at me playfully when I finally learned how much effort that women put into their makeup each day. This was a similar experience, only at this point I was smart enough not to share my much-delayed revelation with the twins.

I made a small breakfast and was about to bring some upstairs for Kara when Tara stopped me. "She shouldn't eat anything until I find a way to help her," she said with an obvious tiredness in her voice. "I'm not sure exactly what I'll have to do yet and it's best that we keep her ready for anything at a moment's notice."

Soon, there was a knocking at the door. I jogged over to answer it, my heart beating in my chest. Seeing Emily's face briefly startled me with it's off-putting features - well, that's how I felt at the time. I had to remind myself, as I did the last time I saw her, that she was actually a pretty attractive woman... it was all the time I had spent with the goddess-like twins that made Emily look almost ugly in comparison. Her black hair was still up in a bun, but she hadn't bothered with the long coat this time, probably due to the house being so far from prying eyes. She was wearing a very professional outfit complete with a black buttoned top with a white shirt underneath and black pants. Her figure was slender enough, but she would definitely look invisible next to Kara or Tara.

"Come in, come in, it's good to see you again."

"Good morning. Thank you for calling me... when I didn't hear from you for a while, I began to assume--" Emily's eyes widened as if she had been punched in the gut. I glanced behind me to see Tara's tall form and wide lower half approaching us. Tara had put on a dark grey bedsheet as a skirt to preserve some modesty. "Dammit. God damn you, Blackbourne. You got my hopes up. I NEEDED this job. What is this, some freaking reality show? Well, I'm NOT signing any papers but I AM sending you a bill for the gas I spent driving all the effing way out here." She turned towards the door in a huff.

"No no no, wait!" I cried. "This is real, hear us out. We have a real job for you." I turned to Tara in the hopes that she would jump in, since I hadn't wanted to bother her enough to ask exactly why she wanted Emily to start working so suddenly.

"It's true, Ms. Williams. I do wish to hire you - immediately. And as a sign of good faith, and to ensure that you decide to stay here and keep your silence, I've gone ahead and paid off your student loan debt."

Emily stared at Tara like she was crazy. "I don't believe you."

Tara smiled politely. "That's understandable. Please, check your accounts."

Emily whipped her smartphone out of her purse and tapped the screen a few times. "No reception out here," she grumbled.

"Feel free to use our wifi. I disabled the password earlier today." Tara crossed her arms under her heavy breasts. I loved her confidence.

Barely over a minute later, Emily looked flabbergasted. "It's... all of it... why?" She looked back up at me and Tara. "Almost two hundred thousand..."

"Because I checked your qualifications and I knew your desperation for work. If you help me, you will be able to accomplish things that no one else but me ever has. And while you will need to keep most of it a secret, I will ensure that you are well compensated."

It was like a switch was flipped in Emily's head. I could practically see the stress evaporating from her body and dollar signs in her eyes.

"You've got a deal."

While Tara began quickly explaining the story behind her unique body and what she needed Emily to do, I went upstairs to check on Kara. She looked perfectly healthy, but her expression seemed vacant and her eyes unfocused. She was casually stroking her enormous naked breasts as she lay on her bed.

Eventually, Emily entered the room and shot a look of disgust at Kara. "Oh god. Really? I thought the giant ass was ridiculous enough."

I didn't care for her attitude, especially with Kara in the condition she was in at the time. "What do you want?"

"Oh, Tara wanted me to tell you to bring her sister downstairs. Um..." she said with her eyes fixated on the quivering tits. "...are you actually able to do that?"

"Yeah, I got it. I'm, uh, stronger than I look."

It was actually a little easier than I expected it to be, leading me to wonder if I had grown a little stronger over the last day or so. I carried Kara's body down the stairs with Emily guiding me... as I couldn't see anything with a pair of gigantic boobs eclipsing everything in front of me. Emily moved a mattress over by some of the lab equipment in the living room and I placed Kara down gently. As Emily began drawing some blood samples from Kara, I asked Tara quietly "So why did you want Emily to start now?"

Tara's natural blush grew darker and she shot me a coy look. "Because it's getting more and more difficult to work my equipment as I grow larger. Eventually, Emily will be my hands... allowing me to grow as much as I desire."

The next few days were like a blur. Tara seemed to be a lot less stressed out now that she had Emily backing her up, even though it meant having to spend time teaching her some of the ridiculously advanced methods that she had discovered. To her credit, Emily barely stumbled at all when presented with stuff that appeared to be far beyond anything she had learned in school or in her internships. Now, I don't mean to suggest that Tara was completely stress-free - each day after Emily went upstairs to bed (now that Tara was living entirely downstairs, Emily had taken her room), Tara would almost immediately jump me and basically use my body to get herself off. I had zero complaints. On a couple of occasions, she would practically drag me to an unoccupied part of the house while Emily was working and have her way with me. I was a little surprised that she didn't just fuck me right by the lab equipment with Emily watching - after all, there was absolutely no way that Emily wasn't able to hear us.

Kara was kept sedated to reduce the stress on her mind and body. Tara's research had revealed that Kara's heart was also being pushed to the limit, between all of the extra blood being pumped over a large (and growing) area as well as her heavy milk production. What I hadn't considered until Emily brought it up was the potential strain on Tara's heart, but Tara reassured us that she was doing fine since there was less going on inside her body compared to Kara's. She did, however, tell us that she wasn't just looking to find a "cure" for Kara, but for herself as well, because she had a strong feeling that her heart would need to be strengthened considerably if she was going to continue expanding.

I had asked Tara if she needed me to take charge of Kara's regular milking while she was unconscious. "Unfortunately, we can't do anything about that right now," Tara explained. "We need to keep her body's stimulation to a minimum." As a result, Kara's breasts weren't just growing as they had been - they were becoming increasingly full of milk with each passing day. One memory that stands out for me from this time was having to go to the store to buy (among other things) regular milk for the first time in a while. I've never been a big milk drinker (although by now I was fond of it coming straight from the source) but Tara was taking this pretty hard. We were only able to keep a limited supply of Kara's milk in the fridge simply due to a lack of space, and Tara seemed to go through that supply pretty quickly. At least she managed to keep one container, so that they would still have a small amount of milk to continue their expansion each day. The way that Tara had been drinking the stuff made me wonder if she was hoping that enough of it would produce further effects beyond the tiny required amount, or if she actually just liked the taste that much.

Either way, Tara's daily expansion continued unabated. The twins were so big in their own special ways that I wasn't able to notice each day's new growth at a glance, but as each day passed, there were definitely signs that changes were occurring. Whenever she had to move from room to room, Tara was typically in a rush - it was admirable how hard she was working to help her sister - so she would go through doorways at an angle to prevent getting stuck. Eventually, I noticed more and more of her ass grazing against the door frame, and I swear that there were times when she would deliberately go through them at a different angle that resulted in her having to more forcefully squeeze through. Her closed eyes and deep breathing was a dead giveaway.

One day, I entered the living room/makeshift lab in the middle of an argument between Emily and Tara. That wasn't unusual - between Emily's attitude and Tara expecting a lot from her in a time of crisis, the two bickered a fair amount, but it all seemed harmless. This time seemed to be more heated. "It just. Doesn't. Make. Any. Sense. I don't CARE how smart you are, it's not relevant right now, this is something we need to do if we don't want her situation to get worse!"

Tara had her arms crossed under her bosom. They had been basketball-sized a few days prior, and were now entering the exciting territory beyond regulation sports equipment. She had moved on from wearing Kara's old clothes and was now stretching out one of my t-shirts to the limit. "I'm not having this argument again. I can succeed without ceasing her growth. This is not up for debate!"

That's when I realized that Emily wanted Tara to stop giving Kara her daily dose of her own special milk. Yes, that's right - even while she was sedated, Tara made sure that her sister could continue expanding. As much as I never wanted Kara to stop growing, I thought that Emily might have been correct. After all, it was Kara's enormous size combined with producing enormous quantities of specially-engineered milk that was causing her issues in the first place. Tara remained firm on the subject and eventually Emily gave up. For better or worse, Kara's already mammoth mammaries were going to continue growing and filling with milk... oh, and her deliciously sexy ass was slowly growing, as well.

Finally, almost a week after Tara had begun her work, I was woken up in the middle of the night. Tara loomed above me, and I could only see her silhouette as she stood in front of the hall light. She didn't even have to say anything: I knew that her work was finished, and it was time to help Kara.

I helped Tara move some equipment up to Kara's room where she was still resting, just not nearly as peacefully by this time. Her breasts were bigger than ever, covering most of her body, and they appeared to be painfully full of milk... her skin was nearly taut and didn't appear as soft and pliant as they had before. Kara's nipples were engorged and a dark red, about eight inches in length and half as wide.

"I need you to try and separate her breasts so I can reach her actual chest," Tara ordered. It was far from easy, especially since they were much firmer now than before thanks to all the milk, and considerably heavier to boot. Fortunately, Tara didn't need much of Kara's chest to be revealed, and she gave Kara some kind of shot once she was able to reach her non-mammary body. After that, Tara set about hooking up some of the various medical equipment to Kara's arms and even a small sensor to her forehead. Beyond that, I find it hard to describe what Tara accomplished that night as it began to look less like the kind of medicine I had seen in movies and more like some kind of sci-fi alchemy. The taller sister alternated between giving her shorter sister oral medicine and more shots to her neck, arms, and legs. It was then that my groggy mind cleared up enough to realize that Emily wasn't helping out - I didn't know if Tara just hadn't thought to wake her, or if she wanted to keep this between us.

Nearly an hour passed before Tara appeared to be finished administering medicine and obsessively checking results on her equipment and laptop screens. Exhausted, she fell back onto her colossal ass and breathed heavily. "Now... all we can do is wait, and hope."

"No," I said. "I know that you've succeeded. You're the smartest person in the world."

A few more hours passed. While I was extremely tired, and Tara looked like she was one sheep away from falling into a coma, we both managed to stay awake as we waited for something else to happen. Upon hearing a small groan come from Kara's mouth, Tara and I rose to our feet in a heartbeat and my breath caught in my throat. Before long, Kara's eyes started fluttering and she started shifting around a little. I looked over at Tara, and the expression on her face told me everything: Kara was better.

I helped remove all of the equipment from Kara's body and adjust her so that she was sitting up in the bed. In this position, her breasts appeared even bigger since they weren't somewhat flattened out across the bed. Only her ankles and feet were uncovered by heavy, milk-laden breast flesh. We let Kara regain her bearings before we burst into an explanation of what had happened. Poor Kara looked so confused as Tara and I talked over each other but we finally got a smile on her face once we had managed to calm down.

By this point, the sun had started to rise. That momentary distraction brought a pained look to Kara's face. "Oh god, my boobs... they hurt..."

Tara turned to me. "The painkillers I gave her are wearing off. We need to help her!"

"YES! Please! Get the pump...!" Kara appeared to be in more pain with each passing second.

I grabbed the tubes, but Tara stopped me. "I need to adjust the pump first. Its default setting would be too painful for Kara right now - she needs to begin expressing her milk at a much more gentle rate, or her milk ducts could become plugged and damaged." I nodded, but Kara's moans were too much for me to just do nothing. Kneeling on the bed by Kara's feet, I reached over to each breast and began to stroke the nipples softly. At first, nothing seemed to happen, so I started moving my hands faster and squeezed a little. This managed to get a trickle of milk out of each tit, but that didn't seem to change. A crazy idea popped into my head, but I knew that it would work. I moved myself over to her right nipple and licked it. Soon, I opened my mouth wide - which wasn't nearly enough to take in the nipple - and kissed it, trying to simulate a sucking sensation.

This began to open the floodgates. Milk began lightly flowing into my mouth - delicious, impossibly sweet milk. Before I could get completely absorbed in what I was doing, I realized that the other breast needed similar stimulation. I raised my head and turned to move over to the neighboring boob.

"God, Jim, that's genius! Don't stop," Tara exclaimed. "Keep doing that for a bit, then I'll be able to attach the pumps to take care of the rest. Is that helping, Kara?" The poor, milk-filled sister nodded, her cries a mixture of pleasure and pain.

I quickly moved my head back to the nipple I had been taking care of, but gestured to the other one. "What about...?"

Tara looked over to the unattended, engorged nipple and its small trickle of milk. She bit her lower lip and had a certain look in her eyes. "Oh, hell," she whispered as she moved over to the breast, wrapped a hand around part of her sister's nipple, and began to lick and kiss. Moments later, the milk was officially flowing, and Tara was gulping it down as if she was dying of thirst. She only paused to make sure she had swallowed every drop. "So fresh..."

Kara's cries and moans had shifted over to complete pleasure a few minutes later. It seemed that the worst pressure had been relieved, but there was clearly too much milk for Tara and I to handle ourselves and soon it would be time for the machine to do its thing for a long time. "God, that feels amazing," Kara moaned. "I wish I could drink some too..."

Tara filled her mouth with milk but didn't swallow. She stood up and moved around the bed towards her sister's face. I stopped drinking - both nipples were leaking right onto the bed - and I knew that something big was happening. Tara placed her hands on either side of Kara's face and brought their lips together. Some milk escaped their lips and dribbled down Kara's chin. Tara pulled back, her lips still slightly parted. Both of their faces were blushing. Kara lifted her arms, wrapped them around Tara and pulled her back down for a deep kiss.

I couldn't help but stare. Eventually, I snapped out of it long enough to get up and attach the pumps to Kara's nipples, then turn them on. The hum of the machine was a bit quieter than usual, thanks to Tara's adjustments, but milk was still squirting out faster than ever.

The sisters pulled apart as they stared into each others' eyes. "Tara... thank you for everything. I... love you, sis." Kara then turned to me. "And I love you too, Jim. I don't know if I could live without the both of you..."

I smiled wider than I ever had before. "I love you too, Kara, just as I love you, Tara."

"And I love you, Kara, and you, Jim."

None of us spoke for several moments before we all let out a small laugh. It was such a crazy moment, and we were just giddy with happiness - and exhausted from everything else. "I feel that I need to add that I'm also in love with both of your amazing bodies," I said with a grin. "And I love meeting every new inch of each of you with every passing day."

The twins laughed. "You know, I actually like hearing that," Kara said. "I mean, from what you told me about what happened... I'm not just Kara anymore. I'm Kara and Kara's Titties."

"Don't forget that butt of yours! It's not exactly small, and it's still growing too," Tara giggled.

"Look who's talking," Kara rebutted. "And by the way, your boobies look incredible."

"Thank you! Jim's been taking good care of them. But everything's been so stressful and rushed lately. I wish we could have a nice growth spurt so that we can all take some quality time and get to explore our bodies together..."

"I may be able to help you with that."

The twins looked past me and I whipped my head around towards the bedroom door. Emily stood there with a sly smile on her face.

TO BE CONCLUDED