The mirror

You give the room a quick look over, and head straight for the mirror, eager to get a better look at exactly what state your body was left in. A naked figure stares back at you- the same face you recognize, on a body that isn't quite your own. Your breasts have swelled to almost double their original size, and you think they'd easily fill up an E-sized bra. Between your legs is a sizeable penis, and behind that is still the walls of your pussy, still a bit damp from the earlier arousal. Your skin is entirely red, a deep shade of scarlet, aside from the darker crimson that colors your nipples and sex. The lowest parts of your end in hooves, and a pair of small, pointed horns poke out of the skin just under your hairline. Overall, you feel like you've put on weight as well, as your hips and thighs are wider than you remember.

As you look in the mirror, though, your reflection starts to change. It heightens, breasts and hips shrinking, until it's almost seven feet tall. Its chest puffs out, growing the shape of prominent muscles, and a similar change moves across the arms and legs. You avoid looking directly at the groin, but eventually you spot movement and curiosity gets the better of you. The reflection's cock has lengthened, growing downwards, shaping itself into the distinct shape of a horsecock. A pair of balls fall down behind it, clearly sizeable and heavy. The changes appear to end, and when you look back up, the face that stares back at you is one you don't recognize, masculine and sneering, head topped with a pair of large horns that curl around twice.

It's obvious now that the mirror is showing you the demon's true form, and while it's rather intimidating, you're reassured to know that the beast is somehow trapped within your body. For whatever reason, he decided to shape your body in the way he did, rather than making it into his original body. As your reflection in the mirror returns to normal- or at least, this version of normal- you turn away and decide where to go next.