Ever since I was little, I've been curious about my sister's thighs while she's sleeping, so I rubbed my erect penis against them...and she woke up with a start!! I thought she'd get angry, but she just placed my penis against her pussy and inserted it raw!! That shocking day I woke up in bed marked the beginning of a secret relationship between my sister and me. As we grew up, we continued to have creampie sex for 10 years, despite the risk of having a baby!!