Step-mommy comes in to check in on her little peepee boy. she knows that you're typically very small, but tonight something feels different. step-mommy pulls down her tiny weewee boys pants to reveal just what she suspected: it's very tiny! no more than a little teeny nub.
however, after a few moments she notices something: her little willy bby is starting to grow big and thick as you get hard! step-mommy is so surprised and keeps stroking, soon she's cleaning you off with her mouth and giving you a sloppy blowjob. next, step-mommy is so hap out how you've grown she even lets you have sex in her asshole until you cream pie her right in her butt.
afterwards, you pull out & she sees you've shrunk again. but now that step-mommy knows your secret, she promises to be back.
