My sister called me and said that she had to go out of town to help her husband’s family. She begged me to watch her son while she is away. I agree and tell her to drop her son off at my house. When they came to the door, to my surprise, he looked old enough to stay home on his own. When I asked why, she said she didn’t want him to be tempted to bring a girl over to the house, hoping that in my house he would behave. I told her that her son would be in good hands and she left. When I saw him, I thought he was gorgeous. No wonder she was concerned with him bringing girls to his place. I’m sure he had to beat them off with a stick. He asked me where he could unpack his things and directed him to his room. While he changed, I watched him through a crack in the window, spying his bulge in his boxers. I knew that this was wrong since I was his aunt, but I was so horny for him. When he came back out, he thanked me for letting him stay and asked if there was any way he could repay me. I took a chance and told him he could suck on my tits. I expected him to laugh or run away, but he pulled down my shirt to reveal my big, bouncing tits and took one in his mouth while he rubbed my other nipple. My clit and nipples were hard and my pussy was desperate for his cock. I told him that I would fuck him if he kept this a family secret. He agreed and I told him to sit on the couch so I could ride his cock. Bouncing up and down on his dick felt spectacular, and having his hands rub my clit and nipples while I rode him only made my pussy wetter. His cock felt amazing inside my pussy. My nephew is the best cock I’ve ever had!