Hi again, everyone - I hope you all enjoy this chapter. Apologies in advance for the lack of actual breast expansion in this one, but hopefully everyone can appreciate the content regardless. As always, comments are greatly appreciated, either on Overflowing Bra, DeviantArt, or at tusdine@gmail.com. Thanks for reading!

SAME DIFFERENCE
by tusdine

Chapter 11

I woke up several hours later, but I felt like I had slept for at least a few days. I wanted to just lie in bed and have that fuzzy, uncomfortable feeling linger in my head as I tried to remember if what happened the night before with Kara had actually happened. The damp, sticky sensation next to my pelvis was proof that it had: it seemed that I had fallen asleep before I could remember to change the sheets. It had been a really long time since I had last had sex without a condom, so I had also forgotten just how messy it could be. Cursing myself for not taking care of the mess before falling asleep, I groggily got up and awkwardly pulled the sheets off of the bed. I tossed them into a pile near the door to take care of later, since I desperately needed to take a shower.

It was nice having an attached bathroom since it saved me the step of putting on pajamas or a robe just to walk to the shower. The girls wouldn't complain, I'm sure, but I felt so disheveled and messy and I wanted to clear the fog out of my head before I interacted with anyone else that morning. I turned on the shower and spent a little time trying to figure out where the perfect temperature was, as I had only used it one time before this.

The water hitting my skin felt heavenly. My head cleared up faster than I expected and the clear memories of my experience with Kara started flooding in. I had thought about having sex with her since I met her, but actually doing it was completely different - and much better - than I had expected. That was in part because I hadn't even had a chance to fantasize about her most recent growth spurt before we had sex. I had a borderline-crazy grin on my face... I had sex with the girl of my bustiest dreams, only her breasts had been even bigger than in my fantasies! And growing larger at a constant rate!

Much to my surprise, my bathroom's door opened, revealing Tara. She was wearing a loose white t-shirt and a giant pair of panties that seemed to disappear into her flesh as they wrapped around her backside. She held a finger up to her lips, motioning for me to remain silent. Tara stepped into the bathroom, and her massive ass was forced to squeeze through the doorway a little. My first thought was that her butt was noticeably bigger than it was the previous evening, but it was hard to tell without some kind of side-by-side comparison. I was still in awe of her new size after growing so fast the night before. Tara approached the shower door and was more than tall enough to be able to look over it so she could speak to me. "Mmm, glad to see you're ready," she purred.

I looked down without thinking, even though I instantly knew she was referring to the erection I had from thinking about my time with Kara. Even if I had been thinking chaste thoughts, the mere sight of Tara's ever-growing form and drop-dead gorgeous face would have had me at full mast by that point anyway. "Uh, morning, Tara. What's up?"

"What's up? Well, I know what you and my sister were up to last night," Tara said with a sly smile. "You two weren't nearly as quiet as you thought you were."

I was really worried that Tara would be furious, but I wasn't sure if she would be more upset with me or Kara. Then I remembered something. "Oh! Are you feeling okay? Kara said--"

"She made me sick, I know. I realized that something was amiss when I heard her in your room. I found an old bottle of ipecac syrup in the kitchen this morning and I knew that Kara must have used that."

"Wait, hasn't that stuff been off the market for, uh, a couple decades?"

"I believe so. Fortunately, as you know, we're very strong. If the medicine had turned dangerous over the years, I wouldn't know because I feel just fine today. But forget all that! We don't have much time."

"For what?" I asked.

Tara pulled off her shirt. Her breasts, while practically microscopic compared to Kara's, still looked amazing and full and her pink nipples were very inviting. "Kara's pumping now. She only has to do it once per day from now on, and it takes her a little longer than her previous sessions, but let's not waste any time."

I was pleasantly surprised even though I really shouldn't have been. "Alright, then! Let me finish up in here."

"No! I've always liked the idea of sex in the shower, and if we're being honest, I don't think I'll have that option for much longer." Tara slapped her ass, causing it to jiggle and wobble. She reached down to remove her panties, but soon stopped and opened the shower door. "Um, I'm going to need some help... It's been getting more and more difficult to put on or remove my underwear." I could see a bead of sweat forming on Tara's forehead and her cheeks began to look a little flushed - she seemed greatly aroused at the idea of growing too large to comfortably wear panties. Tara took a step forward and turned around, her ass whooshing through the air and wobbling like crazy when the rest of her came to a stop. I reached over the rounded shelf of her cheeks to the top of her panties, grabbed them with both hands, and began to pull them up and around her curves until I could more easily pull them all the way down to the floor. Her ass was simply gigantic.

Tara slowly turned left and stepped sideways into the shower. I quickly moved up against the wall opposite the knobs to give her space, and as it turns out, she needed most of it. Her body, by which of course I mean her gigantic ass, brushed against my own body as she sidled into the shower. My cock was as hard as could be and I was glad that Tara's body was blocking most of the hot water because I think I would have passed out from intense arousal. Tara was nearly up against the other wall and there was maybe - MAYBE - an inch between her ass cheeks and my torso. My penis was down near the bottom curves of her cheeks and was being pressed down by her flesh. Just having that skin-on-skin contact felt incredible.

Moaning softly, Tara said "Another thing I've always dreamed of doing is having sex doggy style. It's not quite the same standing up, but as with the shower, it's not something I'll be able to do for much longer." I didn't say anything. I couldn't say anything. I knew how good sex with Kara was, so the bar had been significantly raised in my mind and I fully expected sex with Tara to be at least as mind-blowingly stupendous. Plus, this would be my first time having sex with the sister of a woman I've already slept with - and a twin sister at that, even if they looked nothing alike. That fact alone was driving me mad with lust.

Tara bent over as much as she could, pressing her prodigious booty against me. My entire midsection from my pecs to my cock was engulfed by her heavy flesh. Grabbing each cheek in one hand, Tara pulled them apart to give me some more room and to be able to actually view her clearly-moist pussy. I had a little difficulty maneuvering my throbbing hard cock, as it was still being pressed down by her ass, but I managed to get it into position. I wanted to ask Tara if she was ready, but I was still having trouble focusing to get the words out.

"TAKE ME, Jim!" Tara hissed. She had barely finished that sentence before I thrust my cock into her pussy. The situation was definitely not perfect: I had almost no room to move my hips, the sheer size of her cheeks, even while spread open, still prevented my entire six inches from entering her, but I would be the biggest damn liar ever if I said it wasn't absolutely phenomenal. I thrust as much as I could, bending my upper body over to be able to reach and grab as much of Tara's ass as I possibly could.

Tara had amazing control over her body, especially for a virgin - the way she squeezed my cock with her pussy every time I thrust into her felt like nothing I had ever felt before and definitely made up for the lack of space to move. Hell, even the idea of being crammed into the shower between the wall and her giant ass was still driving me crazy.

"Jim... oh shit... Jim, spank me!"

I did not need to be told twice. I raised my hand up as high as I could go and slapped it down HARD. My hand stung like crazy, but Tara squealed in pleasure. I just needed to adjust the way I did that to prevent myself from getting hurt. I alternated hands, with one always grabbing and squeezing and groping, and the other slapping that amazing ass with great force. If Kara hadn't heard us before, she definitely would have heard us by that point.

The whole situation was so wild that I had no idea if Tara had reached orgasm yet, or if she had already experienced more than one. I knew that I was going to burst at any second. I began to just beat on Tara's ass with both hands as I moved my hips with my limited space as fast as I could. Tara responded by standing upright, her head held back and her teeth gritted. She was clearly having an orgasm, but her movements had pulled my cock right out of her and there was no way I could enter her again at that angle. She let go of her cheeks - the flesh colliding in the center, slapping heavily against my erect cock - and tweaked each of her nipples as she rode out her orgasm.

My cock was engulfed between her cheeks now. Desperate to cum, I thrust against her ass as much as I could and fucked her ass cleavage. Tara moaned louder - much louder - than before and brought her hands back to her ass to feel herself. "Oh god! Jim, that... feels even BETTER..."

This continued for less than a minute before I finally blasted her ass with my load of cum. Tara began to squeeze her tits again and orgasmed, inadvertently pushing me hard against the shower wall. I couldn't breathe until her orgasm subsided and she moved away from the wall slightly. "Holy crap," I said, breathing heavily. "How was that for you?"

"Incredible... just, incredible," Tara sighed. She slowly and carefully turned around, her flesh brushing against me as always, until she was facing me. I looked up at her beautiful face. I had missed it a lot. Having sex from behind was great, but it felt almost criminal to not look at Tara's - or Kara's - gorgeous faces. I brought my hands up to her face and helped guide her down to me for a sweet kiss. Her full lips were incredibly soft. She leaned back and grabbed the detachable showerhead and began to clean up the mess I had left behind. "I knew that my butt was extremely sensitive, but that was something else entirely," she said fondly. It gave me an idea for something I would definitely have to do with Kara and her most sensitive parts. Not that I hadn't already had that idea before.

Once she had cleaned up, Tara squeezed out of the shower and grabbed a towel to dry off quickly. "Kara must be finishing up now, so I should run before she catches us." She grabbed her clothes and dashed out of my room. I could only chuckle and shake my head as I cleaned myself off. These sisters seemed downright delusional when it came to this "sneaking around" with me. Sure, it was working out in my favor... at least, so far. I wondered just how far this would go before things started to get weird.

After finishing with my shower and getting dressed, my stomach growled loudly. It had been way too long since my last proper meal. Even during the twins' feeding frenzy the night before, I had barely touched any food - partially to save it for them, and mostly because I was just entranced watching their new, larger bodies replenish their strength.

I walked down the hall towards the staircase. Tara's door was closed - I thought that perhaps she was in there, to pretend like she had been there all morning. A little further down the hall, I saw that Kara's door was open and I could hear the familiar sound of her pump. I thought that she had to be finished by now, unless her once-a-day pump lasted well over an hour. I peeked my head into the room and my jaw almost dropped at the sight.

Kara was lying stomach-down on the bed. Her breasts - definitely a little bit bigger than they were the last time I saw her - were lifting up Kara's upper body a bit as they rested on the bed in front of her. The pumping nozzles were still on her engorged nipples, although it appeared that no milk was coming out anymore and the milkjugs were filled. Kara had one hand groping her breasts and the other was in her cute turquoise panties as she fingered herself. Both the panties and part of the bedsheets were soaked - clearly, Kara had been doing this for some time. Kara's eyes widened as she saw me. "Oh god, Jim, pleeeease get over here, I neeeeed you right now!"

It was as if I hadn't had sex in months. In mere moments, I had removed my pants and underwear and was positioned behind Kara. I felt too impatient to even properly remove her panties so I just moved the part covering her sopping wet pussy and pushed my way into her tight body. Much as it was impossible to not compare Tara's tits with Kara's, I couldn't help but feel like Kara's ass was severely lacking compared to her sisters'. Before long, I was able to focus on the moment and realized that Kara did have a bigger-than-average booty, especially for a girl of her petite size.

Kara had a thunderous orgasm almost immediately. After that, I couldn't tell if she had any more because she was in a constant state of moaning with her face pressed into her cleavage. I came before long, surprisingly, and pulled out. Kara continued lying on the bed, her head turned to the side so she could actually breathe. As I wondered if I needed to take another shower already, Kara turned her head towards me as best as she could. Despite all the sweat and her tired eyes, she was stunning.

"Jim, we need to talk."

TO BE CONTINUED