Shemale Breeding Her Dog-Knotted Sister

Book Summary

Riley had always fantasized about dogs. When her large rottweiler jumped up on the bed with her, she couldn't resist the opportunity. But when his canine knot swells too much for her mouth to handle, she finds herself stuck. Will she be rescued when her hot, shemale sister Jessica rushes into the room, or will she be at the receiving end of a fantasy that Jessica has, until this day, kept secret?

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Reality finally hit her when she noticed that her jaw was starting to feel awfully strained. Coming out of her blissful high, she realized that his knot had swelled immensely. So much so that it was now trapped behind her teeth, and she couldn’t open her mouth another inch. She knew dogs had one, but never expected them to get as fat as this. When panic started setting in, she inadvertently swallowed, opening her throat just enough to allow a few inches of his throbbing shaft to slip even deeper into her. Not only was he trapped inside of her mouth, but half of her airway was now blocked, making it hard to keep breathing. A heavy stream of pre cum oozed out of him and into her tight, wet throat, causing her to cough.

“Mmmph!” Riley let out a muffled scream after another as she did her best to pry herself off of him.

She didn’t want to hurt Fred, which would be inevitable if she were to free herself. Getting stuck on him was one thing, while being found in this position by her family would surely wreck her life. He likely wouldn’t go soft until he unloaded his fat balls into her throat, which would likely drown her. But she couldn’t bring herself to make him climax when she was feeling distressed.

While her mind went wild trying to think of something to do, Fred began barking. He was probably calling for help, and while Riley definitely needed that right now, she dreaded getting found. Luckily, she knew that only her big sister Jessica was home, so at the very least their parents wouldn’t find out. Not right away anyways.

Jessica was down in the kitchen putting something together for lunch. At first she ignored his barks since it wasn’t out of the ordinary. But when they kept on going, and she didn’t hear Riley doing anything about it, she decided to investigate.

“Just what is going on up there?” Jessica said out loud as she ascended the stairs.

All the barking came from Riley’s room, which normally wasn’t closed. Rushing to the door, she barged in without knocking and couldn’t believe the sight before her.

“Riley, what are you doing to Fred!” Jessica yelled as she hurried over to the opposite side of the happy looking dog.

Riley’s heart skipped a beat when her sister arrived. She could barely look up into her eyes when she stood right in front of her. Her sister was glaring at her, and her mouth was too stuffed to plead very well.

“Mmph! Ahm Shtughck!” Riley tried her best to say that she was stuck.

“Stupid girl, getting yourself knotted on our dog’s cock.” Jessica said.

Both sisters got along fairly well, though Jessica was still the bigger sister. Much like Riley, Jessica also had naughty desires in her mind. Instead of animals, Jessica fantasized about fooling around with her sister. Not just licking and sucking her all over, but rather, stuffing her tight, virgin holes with the large male organ she still had. She had transitioned years ago and now had the perfect female body that she had always wanted.

Jessica also never tried to fulfill her fantasy. She typically just imagined stretching her sister wide at nighttime while stroking her large cock, bringing herself to climax as cum rained all over. But now she was presented with the perfect opportunity to change that. Just looking at her trapped sister was enough to make her pants feel tighter.

“You’re lucky that our parents aren’t home, or you’d likely get kicked out onto the street with nothing.” Jessica taunted her sister, grinning sinisterly. “Now, if you behave, I just might not tell them anything.”

Riley wasn’t sure what her sister meant, but it was quickly becoming clear. Jessica began rubbing the front of her jeans as she gazed into her sister’s terrified eyes. Once they felt ready to explode open, she worked her belt loose and popped the button free. When the zipper shot all the way down and the bulging underwear inside pushed out, Riley wanted to just scream. But with how her lungs seemed to constantly burn for oxygen, she knew to conserve her air.

“You know, if you just wanted a dick to suck, you could have just come and asked me.” Jessica chuckled, slipping her fingers into her bottoms. “At least you wouldn’t have gotten stuck on mine.” Tugging her underwear and pants down, her mighty cock sprung free for all the see. “Well, on second thought… I probably would get stuck in you. Just look at how hard you’ve made me!”

Riley gazed at the madly throbbing cock of her sister. She couldn’t figure out how she was able to hide such a beast inside of her pants all this time. The towering mass looked so thick that it could easily rival Fred’s immense knot. She audibly gulped, helping to suck down some of the fresh cream that had built up in her throat.

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