In the bed next to mine, a woman who came to visit me was unexpectedly flashing her underwear, and I, with an erect penis, watched her swaying buttocks through the curtain. Pressing my erect penis against her buttocks through the curtain, I engaged in lewd behavior. The woman, frustrated from not having a boyfriend, became excited by my erect penis and the lewd act, and while her boyfriend was asleep next to her, she accepted my penis, slipped into my bed, and forcefully inserted my penis into her vagina.