I made a mistake letting my younger sister clean my room! She found my hidden porn DVD and said, "I want to watch this! Otherwise, I'll tell mom!" So we ended up watching it together. She was really into it, but she started feeling horny and rushed to the toilet. When she came back, she said, "Porn is so sexy. I'm so wet too," showing me her stained panties. I couldn't hold back after seeing that!
