As he sat on the bathroom floor helplessly played with his pussy, Mike felt his butt begin to expand against the cold tile floor.
He wasn't sure how long he sat there, compulsively fingering himself, but some time later he rolled over and saw the reflection of his butt in the full-length bathroom mirror.
It stuck out from the base of his spine like a pair of basketballs! Round, flabby buttcheeks jiggled and bounced along with the motion of his hand and his bucking hips.
Dark, downy hair covered the buttocks, which seemed to be growing thicker by the minute. Mike began to cry at the ludicrous size of his ass, when he noticed...