The moment the words had left Jennifer's mouth, Katherine was overwhelmed by a strange sensation.
"What did y..." was all she could say with an expression of surprise.
Before she could finish the sentence however, her face vanished in a sudden explosion of growing flesh.
With one massive burst her torso and lower body expanded, ripping her clothes apart. Jennifer screamed in shock, not having expected such a drastic event. Indeed she almost feared that Katherine had been blown apart.
When she slowly opened her eyes, she saw what had happened to the girl.
Instead of Katherine there was a dick on legs on her bed.
Its torso was a large, thick human penis, probably four feet in length and two thick. One could clearly see that there was a small, feminine butt at the penis' base. The creature's legs were absurdly short. Just two, thick limbs, not more than two feet maybe. The legs ended in normally sized feet, indeed the creature was still wearing Katherine's socks.
"Kath...I...I didn't want to..." Jennifer muttered. She had not intended to turn her into a monster. But not matter how sorry she felt, she massive penis in front of her made her incredibly horny.
The Katherine-dick did not seem to mind either.
It's penis was not just hard for fun, the creature was horny as hell, leaking a thick stream of pre-cum.
Slowly it made a clumsy step closer to Jennifer...