My sister, who lives with me, is a career woman who works at a major trading company. Although she is such a serious sister, she is super lazy at home! She drinks alcohol every day in a half-naked shirt! I don't know where to look, so I tell her off, but she ridicules me, saying, "Maybe it's too much for a virgin!" However, when my sister saw my erect penis on her plump, nice body, she said, "My sister is taking my brother's virginity... What a dirty situation," with a dirty look on her face...