我发现我害羞的继妹在玩弄我的内衣，最后我们操得很努力

My shy stepsister looks for me in her room. When she doesn't see me in the room, she finds a pair of my boxers and starts playing with them and masturbating really well. I walk in and discover her doing that. When I see her, I really want to fuck her and I end up cumming in her ass.