He says it all started maily because he couldn't take his eye of her niece's boobs every time he saw her. It was so strong that she ended up noticing it but she only got the courage to ask her uncle about it one night after she got drunk and told her also because he was drunk. He said he dreamed about seeing, touching and sucking her big tits. From that it didn't took long for her to let him do all that but also for her to suck his dick and fuck her. When they woke up the next morning they discovered they felt good with it so they started doing regularly.