He decides to sit down. Surely he can't leave her now. If she goes through another growth-spurt, the couch won't make it. Hell, the apartment itself might not make it. In that case, he'd need to wake her and get her out immediately. For now however, he lets her sleep. He sets the vial on the coffee table in front of the couch, gently sitting down next to his sleeping mom. The couch groans, more than upset at having to support a giant horse-woman. Having such an amazonian figure, he can't help but lean with the furniture, which bends inward towards her. His face hits her fur, and he immediately feels the warmth coming from her body. It's comforting and inviting, and he can't help but let his face lay against her torso. Slowly, his morning tiredness returns as her brown horse hair keeps his left cheek warm. Finally, without even realizing it, the combination of heat, comfort and sleepiness overtakes him as he's buried into his mother's side.
...
Katherine excites with a jolt. Her eyes burst open from her heart pounding so loudly. Not only that, she feels full of boundless energy, ready to run a marathon or ten. She tries to use her energy to jump up from the couch in excitement, but several things quickly get in the way. First, she feels different. Really different. To a point where the own weight of her head feels different. Second, her body reacts differently from what she is used to. It feels like her motor controls are suited for an entirely different animal. Third, but perhaps least interesting, there is a body laying into her, to her right, digging into her while she sat there. It's then that Katherine realizes she doesn't why she sat down and slept in the first place. She looks down at the little person snoozing against her. It's Chris, nestled peacefully, face against her brown fur. Instead of feeling relief at finding out it was her son, she goes wide-eyed, staring at the body he's laying against. Her body.
She jumps up again, frantically this, but making sure not to disturb Chris, who falls into where she was sitting, face up and still asleep. She almost loses her balance again, but manages to catch herself before her massive horse rump falls onto her son's head. The floor breathes slightly at her hooves. As she stands straight up, she can't help but gaze down at herself. Damn! She looks amazing! She's immediately reminded of something similar a body-builder or porn star! Her boobs are intimidating in size and her body is beyond toned. There is a key aspect that sticks out to her however; She has hooves, and fur! Not only that, she can see her nose has been replaced by a muzzle of some sort. She cranes her head to the left, where there's a mirror. Staring back at her is an extremely shapely, anthropomorphic Clydesdale woman! As she stares, she feels like she should be freaking out more. However, seeing her naked body is causing a different kind of excitement. Not a fearful excitement, but arousing one. She blushes at her feelings towards her own body, and tries to calm herself down. However, instead of cooling off, she begins to feel a heat emanating from her nether region. She blushes harder, and looks for something to distract herself.
She clops carefully around the coffee table, half as a distraction and half to get used to moving around in her new body. It's then, that she sees the vial. It's small, especially to her new form, but the glass catches the morning light from the window. Picking it up, she naturally looks at the label. Her equine brow furrows as she becomes enlightened to what has happened to her. She looks over the small liquid container; there's a sweaty finger print on the smooth glass of the vial. She looks away from it, and at Chris. She begins to feel angry, but out of nowhere, her arousal spikes up. Not expecting this, she blushes really hard at not being able to control her own libido. In shame, she looks away from her son while her breasts and groin grow even warmer. She quickly leaves the living room and her son. She heads to the kitchen in an attempt to cool down. There, she gasps and almost drops the vial.
On the counter, the case rests with one of its drawers still open. Looking into it, she sees a few vials. Of them, they're all different colors. Her eyes eventually fall towards an empty space in-between a few more vials. In silent wonder, she replaces the vial in her hand into the area to see if it matches, as if to satisfy her disbelief. Her equine eyes grow large as the vial quickly refills itself from the bottom up, until it's full to the cork. She picks it up again in full disbelief this time, and weighs it in her hands. It feels full; It looks full. The power of the case of vials is not lost on her. It was this case of vials that made her into the horse-being she is now. This stirs something deep in her, and her excited arousal wells up inside her. She begins to sweat as her groin and chest feel almost inflamed. She groans, able to smell the desire from her groin with her new animalistic nostrils. She needs relief, or something to satisfy her. She stands over the vials, waiting to come to a decision.