You're hiding in your sisters bathroom shower & she's just finishing up on the toilet & zipping up her jeans. She hears a noise & she trhows back the shower curtain to see you, her perverted step-brother, standing there with a boner in your pants. OMG.... how utterly embaressing. She is shocked but wants to see you jerk it to make sure you're doing it right. That's HER JOB as a big step-sister right?? She wants you to follow her hand motions... up and down all the way... but not too fast yet cuz you'll cum quick. Let's try and make it longer. She wants you to follow her & go faster & faster...... Show more