In this adult family role-play, the stepfather we gained after Mom remarried strips my adult younger sister naked under the pretense of disciplining her. I am right beside her but do nothing. Is it because I lack the courage? No—I want to keep watching my perverted stepfather rape her. I secretly watch her cum on his cock, and despite the misery I get hard; before long, that erection turns into a filthy desire to fuck her myself. Then my stepfather unexpectedly asks, “You want her too, don’t you?” I seize the chance to penetrate my resisting sister and creampie her. This is exactly what I had been hoping would happen.