I am looking for a story about. This guy I think he might be freshly out of high school he is somewhat smart. And he has a very bad problem with not being able to saying no when it comes to women. So he agrees to help his mother's neighbor's granddaughter with math. He gives her math lessons after school on her way home. At his apartment. Which is near her school. Eventually a relationship is formed. And they start having sex and keeping it a secret. Eventually she gets pregnant and her sister points out about them. It wants to have sex with him as well. And if I remember correctly at some point the grandmother finds out she is pregnant and who imprognated her. And also says she's just like her mother. Any help in finding this story would be greatly appreciated.