When I asked my older sister, who is a locally famous slut, to let me have sex with her, she instantly refused and said, ``It's absolutely impossible.'' - Unable to give up, I negotiated with her and said, ``I don't mind if you keep your panties on, so let me do it for you.'' My older sister felt sorry for her and reluctantly agreed! - I was overjoyed and rubbed my dick against my sister's pants, and of course it felt better than masturbation, so I ejaculated a lot! - When I thought, ``I'm going to get angry,'' my older sister turned on her slut after seeing the semen, took off her pants, and asked, ``Why don't you insert it?'' She suddenly turned into a lewd woman and asked for my cock!