Your STEP-sister starts to grow a dick. It isn't clear at first, she just seems uncomfortable and you kind of laugh about how much she's grabbing herself. But soon after, she comes back and shows off the small bulge. It makes her feel really good actually, and she pokes that even her small bulge is probably bigger than yours. She can't help herself really, she strokes it until she has this shaking orgasm in her panties.

She wanders off with a smile, like maybe there's more to come... and it's true. Her cumming just brought on MORE growth. Her cock is MUCH bigger, which she shows wi... Show more