Feeling your evil barbed puppy cock swell inside of her butt as Nina screams out in denial, not at all wanting this, begging for you to pull out before it is too late! Instead getting rewarded with her trials with hot puppy seed flooding her butt, making her body grunt and tense up lewdly. Rolling out her tongue and letting out a pained howl as she feels her body react to the perversion that is cum up her butt, all the while Lisa moans deeply and cums hard from watching this, really hoping that she turns feral. Sadly, she does not, as the two of you get to watch Nina lose her shit as she begins to transform. Thrashing about on the bed and against her binds as she gets a matching body to Lisa's, screaming out lewdly as she feels her breasts grow to absurd sizes, her hips getting extra wide for litter carrying, waist impossibly thin, and feeling her pussy walls tighten significantly and get dangerously more sensitive.<br/><br/>Lisa pouting as she rides out her orgasm, not as juicy as it could have had been, while watching Nina get a show stopping body. Growling a little bit too, since it looks like her boobies are bigger than hers!? Nyah! Totally unfair! About to let loose with kitty bitchyness over why she got the bigger breasts, as you lay into her and grab her by the scruff of the neck! Dragging her off to get tied up and hanging from a hook in the ceiling, for her own good, and adding in a ball gag to shut her up. Fury in her eyes as she swings back and forth, her arms straining, as you lay into her with a crop next for being such a ungrateful sister. Welts soon pattern across both her butt and massive boobies, making her scream into her gag and thrash in midair, weeping openly and chewing hard on her gag. Bruising those magnificant boobies as Nina by now recovers from her ordeal, still bound to the bed as she moans lewdly and humps the air. Looking over to what you are doing to Lisa as she lets out a kitty giggle.<strong>"Serves her right for wanting to cum from be turning feral! Nyah! You should turn her feral for being such a naughty sister!"</strong>Which really makes Lisa scream into her gag, eyes wide in terror as she continues to swing back and forth to dodge your blows.