YSN-427 It seems like my serious older sister has found her first boyfriend. - My older sister, who doesn't have much experience, seems to be quite interested in sex, and while she was asking me erotic questions, her eyes suddenly changed and she started staring at my crotch, so I let her do whatever she wanted, and it was super erotic. - A woman

My older sister is a serious person who doesn't know much about sex, but she was in a good mood today, so I asked her, "Has anything good happened?" Apparently, she had gotten her first boyfriend. - Eventually, she would start asking me questions about sex, so I played with her as I saw fit, but eventually her eyes changed and she started staring at my crotch while drooling, and she was going to imitate me and suck it in her mouth, so I decided to let her like it for now. - I tried it.