"Don't Tell Mum And Dad"

You've just caught your stepsister sneaking home and creeping up the stairs early hours of the morning. She wants you to be quiet cause she doesn't want your parents to find out she's only just got home, otherwise, she'll be in so much trouble! But you're known for being quite the annoying stepbrother and being a snitch! She sees the way you look down her tops to catch glimpses of her nipples, so if she allows you to stroke your dick while she teases you, you won't tell mum and dad!