IENFA-3902 - Reclusive stepbrother's sexual obsession

My parents remarried and I started living with my reclusive stepbrother, who is a sex monster! He attacks me without any consideration, even though I'm his sister. I ended up drugging a high school friend who came over with sleeping pills and aphrodisiacs, offering her to my stepbrother as a substitute sacrifice to satisfy his sexual desires. But no matter how many people I offer, his gaze towards me doesn't change. And finally...