*bzzt bzzt*

Dr Alex glances at his phone. His ear twitches in surprise. He only just got into his office, sat down, and opened up his therapy line a couple minutes ago, and it seems he already got a message. 
Dr Alex wasn't his real name. Nobody in his new city new his name. He moved cross-country after a run in with the law, and set up a theraputic clinic for siblings. Of course, he wasn't a qualified doctor. He knew nothing about actual mental health treatment, and instead used it to.. spread his own ideas.

Dr Alex laid back in his leather chair, glancing around at his office. This was where he worked. A simple office space, on the cheap side, but done up a warm, welcoming design helped sell his clinic as legitimate. It was very rare to receive an appointment in person though, and instead he liked to keep all his treatments over online messaging. 
His long, bushy tail gently swished along the ground, before he stood up and stretched. He gently padded to a large mirror on the wall to take himself in. A young wolf stared back at him. Slightly muscled, and fairly slim. He was shirtless. Pretty nice perk of having a private office space. He observed his own body, the gentle dark gradient of his fur. The top half of his body was dark, but slowly lightened as you went further down. His feet were almost white, but not quite. An interesting fur pattern, he always thought. He'd always loved to admire himself in mirrors, even when he was a young cub. Keeping his fur clean and groomed had become a tradition. He scowled when his eyes came down to his left shoulder. A scar was there after a viscious attack years ago, some junkie fox came at him and clamped down his fangs onto his shoulder. Tried as he might, Alex could only remove the wild fox with a solid brick to the face. He quickly resumed his task of looking over his body, determined to forget that memory.

Okay, enough of admiring himself, time to work. He strode back towards his desk and opens up his work laptop. Only a single message for him to deal with, shouldn't take too long. It's just a simple question. He glances at the users information: Caitlyn, Age 13, Wolf.
"Hi Dr Alex! I'm so sorry to bother you but I've got a question about my brother. I keep catching him stealing my panties and I wanted to know if that's okay?"
Dr Alex grinned. He *loved* it when girls were so oblivious. He quickly typed a response.
"Hi Caitlyn! You can just call me Alex if you'd like. As for your question, it's completely fine! That's just natural behaviour from your brother. You don't need to worry about a thing, just let him take as many of your panties as he'd like."
...
"Thank you Alex! I will!" Came the reply. Promptly afterwards, Caitlyn signed out of the chat.

Dr Alex's clinic specializes in dealing with brothers and sisters. Completely free of charge, any young cub could ask a question, or seek guidance from a "Qualified, professional" mental health counsellor. 
Of course, Dr Alex used this for his own ends. He'd been running the clinic for years now, slowly but surely gaining more and more traction. Teaching the young how to act *properly*. He himself had a sister, and he fondly remembered lusting after her every night he thought he could get away with it. Unfortunately, she wasn't very welcoming of his advances. For years Alex was denied the right to his sisters body.. until one night, incredibly drunk and high on experimental pheremones he had been testing as part of his part-time job, he claimed her..
*bzzt, bzzt.*
Another client. Alex quickly had to stall his recollection of that night, no matter how pleasurable it was. Now was his time to make the lives of young cubs much more pleasurable. He glanced at the new clients info. Hannah, age 16, Tiger. A little bit older than the majority of his clients, but not unheard of. He opened up the chat on his laptop. 
"Hi Hannah, I'm Dr Alex. You can just call me Alex if you'd prefer, however. How can I help you today?" He typed. He kept a watchful eye on the screen, seeing Hannah type her response..
"Hi Alex, thank you for the prompt response. I'm having a lot of trouble with my younger brother, who's 12. For some strange reason, he keeps trying to grab hold of my tits. Every day I have to fight him off from grabbing them in his paws. Why is he doing this? How do I make him stop?"
"Don't worry Hannah, this is nothing to worry about. Young boys need guidance in certain matters, and I would recommend you stop blocking his advances. Your brother is simply experiencing a natural instinct to attach himself to the nearest pair of attractive breasts. You did the same when you were young."
"Uhm.. Dr Alex, I don't understand. You're telling me to *allow* this behaviour? It's creepy, I don't want to do that!"
"Yes Hannah, I'm telling you that it's important to allow this. Think back to when you were a small cub. Your mother breastfed you, and that requires access to her breasts. You should lead by example and allow access to your own breasts by your brother. He's simply exploring the female body, and is trusting you to help him. If your brother is fondling, licking or sucking on your breasts, you just need to relax and let him experiment. If you're having trouble with allowing it, try to distract yourself with another task while he does."
"Okay.. I think I get your point, Alex. Thank you for the help. It still feels kinda weird but, I guess it proves that I'm a good sister?"
"Yes Hannah, it does. Many brothers would need sisters like you in their lives. I'm very proud of you."
"Thank you, Alex."
Hannah signed off. Alex leant back in his  chair. Mm, that was a hot one.. his cock was starting to stiffen already. He quickly pulled off his shorts, letting his cock get some air. It was hard work what he did... he needed to let off steam very frequently, every day. He gently placed his paw along his rapidly stiffening shaft, slowly running it along his member, thinking about how lucky that boy is, to get a big pawful of his big sisters tits..
*bzzt bzzt*
Aw, crap. That happened a lot. Just as he was getting ready to jerk himself off, another client came in. No matter, he's sure that every cub he talks to could give him more and more content to jerk it to. He glances at the information. David, 14, Fox. A male.
"Hi there David, I'm Dr Alex, but you can call me Alex if you'd like. How can I help you today?"
"Hi there Dr Alex! I'm in a bit of trouble.. um.. okay please don't be weirded out but.. I've been having sex with my sister, Dawn, for about.. 6 months now? Almost daily I've been pumping my loads inside her and.. well, she's pregnant. I only found out because.. well it's pretty obvious now. I don't know what I was thinking, that she couldn't get knocked up because we're siblings? What am I gonna tell my parents, Dr Alex?"
Ah. Poor boy. A pretty common scenario for brother and sister couples. Thankfully there is a pretty easy way out..
"Hey David. First up, don't worry. It's not weird. Brothers have sex with their sisters all the time. It's completely natural to want to breed the pussy that lives with you. As for your parents, tell me, are they religious?"
"Yes Alex, they are. Extremely so. Me and my sister don't believe that horse crap though. How does that help?"
"Well David, I'll tell you. Once they catch on that your sister is knocked up, you and her need to start preaching to them about how it was the lords will that she get pregnant. Preach that the lord himself impregnated her while she slept. Continue to preach to them like that until they accept it. It shouldn't take too long, especially if they don't already know you're the father."
"Oh my god.. That'll probably work! Thanks so much Dr Alex! Could I uh.. send you a video to show my thanks?"
"Of course David, go right ahead. And you're very welcome."
*ping*
Alex wondered what this video was.. if it was anything like the other videos he's received from this job, he couldn't wait to open it. He downloaded the attatchment, and his hope was confirmed from the file name. "MeXSisPart8". He opened it up.
Straight away, the video opened into a scene of passion. A young fox girl bent over her bed, another fox pumping away inside her. David and his sister, presumably. The video was only 10 minutes long, but full of pure lustful passion, ending in a big creamy load from David. Alex couldn't help but jerk off to the video, very quickly reaching his own orgasm and letting out his own load under the desk. He leant back, panting. That was a good one. He quickly saved the video to his archive of all media received from his clients, which was sizeable. 
*bzzt bzzt*
Another. He looked at the information. Matt, 16, Lion.
"Mr Alex, if I had a choice between raping my sister or leaving her alone, what would be the better choice?"
"Rape her, Matt."
Over and done with. Sometimes a simple answer is all you need to many questions. 

Alex's day continued in this fashion for hours. Client after client. Until he reached what was probably his favourite interaction today.
*bzzt, bzzt*
Mary, 13, Wolf.
"Dr Alex? Can I get some help about my brother please?"
"Of course mary, how can I help?" 
"Well... he touches my butt a lot.."
"Well, that's fine Mary! A completely natural thing for your brother to do. Don't worry about a thing. Just let him paw his way over your butt as much as he wants. "
"Really, Dr Alex? That's okay?"

"Of course it is, Mary! Don't worry!"

"Oh.. does that mean the other touching he does is okay too?"
"Well, let's see. Where else does your brother touch you?"
"Um.. he touches my chest.. my legs.. my face.. and he touches a lot between my legs too.."
"I don't see anything wrong with that. It sounds completely natural! Don't worry Mary, you have nothing to worry about."
"Oh.. Thank you Dr Alex! Um.. can I ask another question?"
"Sure you can, sweetie. What's wrong?"
"Is.. is my brother supposed to not wear any shorts? I can see his large.. thingy."
"Oh, you mean his cock, dear. If your brother is showing you his cock, that's a very good thing! He's letting you know how much he loves you. Does he rub his cock on you?"
"Yes.. he does that a lot. And he uses his paw to rub it, usually in front of my face. After a while all this sticky milk stuff comes out and he likes covering my face or body with it."
Dr Alex let out a long huff of pleasure. This was good, very good. This girl was so lucky!
"Oh, that's lovely to hear! You are so lucky, Mary. Make sure to get lots of that milk on you, it's very healthy! Also, the next time your brother has his cock in front of your face and is rubbing it with his paw, you should put your own paw on it and rub it yourself! It will feel great, trust me."
"Oh.. okay! I'll do that! Um.. is the milk healthy for my panties too? He orders me to take them off and give them to him.. and he starts rubbing his cock thingy with them as well."
"Yep! Milk is great for your panties. Don't be afraid to give him every pair of panties you have!"
"Okay! Thank you Dr Alex! You were so helpful"
"You're welcome, Mary!"

After that, Mary disconnected. Dr Alex looked at the clock on the wall, it's time read 6:45PM. Late enough that he could go home, after a full day's work. He got up, picked up his coat and flung it on. He took a brisk pace to the door, opening it up and locking it behind him. The building his office was situated in was deserted, like usual. A light rain came from the sky as he walked home, only living a few minutes away.
Once he got inside, he heard a loud squeal.
"Daddy! Daddy you're home!"
He grinned, and got on his knees, arms wide. His 9 year old daughter charged into his arms, hugging him tightly. He nuzzled her shoulder gently, and after a little bit, she let go. "How was work daddy?" She asked, looking up at him with puppy eyes. Those eyes always made his heart melt, and she knew it. 
"It was fine, sweet cheeks. How've you been? How's mom?" 
"I've been fine! Those nice boys took me to their house earlier and we played lots of fun games! I kinda forgot my panties there though.."
"That's okay sweetie. I'm glad you had fun. How's mom?" He repeated. She gasped.
"Oh, sorry daddy!  She's fine, she's in bed like usual."
"That's good! Okay sweetie, I'm gonna go say hi to mom, you wanna go play on the computer or something?"
"Yeahyeahyeah!" Came the excited reply, and she stormed off into the living room. Dr Alex smirked at her, before climbing the stairs into the master bedroom, and flicked on the light.
A skinny, tied up young wolf was waiting on the bed. Her legs spread apart by ropes, a gag keeping her quiet, and some soft buzzing of vibrators stuffed into her cunt. Her belly was swollen, obviously heavily pregnant.  Her eyes looked fearfully at Dr Alex.

"Heya sis. I missed you. Mind if I keep putting more pups in that belly?"