I was in bed with a cold, and my high school girl sister said that I looked lonely and came to lie down next to me. - I can't help but get an erection from my sister's good smell! - When I was having sex secretly, my younger sister noticed and said, ``Are you penetrating me? I'll help you get it out.'' She gave me a hand job and fellatio, but it didn't come easily, and my younger sister, who was numb, said, ``It's impossible to penetrate, but if you just want to cosplay.'' - I said, “Okay!” - ?