IENFH-016 - I lied to my little sister, saying I'd only rub it against her, but ended up going all the way.

Taking advantage of his sister sleeping while getting a massage, he goes too far. When she wakes up, she's disgusted but can't bring herself to hate him. She agrees to help him finish, but he pushes for more, convincing her to let him rub against her, only to accidentally slip it in and end up going all the way.