You're jerking off in your computer chair and your big step-sister walks in the room without knocking. At first she's disgusted by you jerking off instead of running she stays and begins to ridicule your small penis. She wonders if it gets any bigger and if she can help it in any way. So, she begins to tease with her body and slowly strip while making fun of your tiny cock and encouraging you to jerk to her body. When she's finally naked, she gets on her knees and counts you down to cum. How sweet of your big step-sister. Taboo - Humiliation - SPH