My delinquent sister came to my room where I live alone. She's usually scary, but she's sexy when she's sleeping, so I masturbate while looking at her panties. My sister saw me and the atmosphere became awkward. Maybe she felt sorry for me when I was feeling down after being scolded, but she said, "Are you a virgin, bro? I'll just rub it." But my sister got excited and her pussy got wet, and I slipped in raw!