SCOP-796 Sister-in-law, please help me.

My sister-in-law is always as ill-tempered as a whore, with a loose sense of chastity. When I talked about my dreams, saying: 'For the first time, with the one I like,' he brushed me off and said: 'You're an idiot. Don't throw away your virginity anymore. I'll let you graduate. Thank you.' Even though I said that, I couldn't resist and was forced to go along with it...