Adventures in babysitting

The Cunninghams called me to babysit for them tonight. They were going to be out until about 1:00 AM. I asked Mother and Dad if it would be OK. They said that since they were friends with them and the only lived five houses down from us it would be fine. When I got down there they told me the baby was in her crib asleep so just listen for her then they left. I watched them drive away and was about to close the door when Jimmy came running up and walked in. He grabbed me and started kissing me, I told him we shouldn't but I didn't want him to stop. We were just inside the front door and he started undressing me. First my shorts then my top and I was standing there in my bra and panties, really turned on so I told him it was my turn. I pulled his shirt off then his shorts but I made sure I hot his underwear too. He was standing there naked with his dick hard and sticking out. I wanted him to be extra ready so I went to my knees and began sucking him. While I was busy with his dick he undid my bra and threw it to the side. I looked up at him and asked if he wanted to do something else. He looked at me and stood me up. When he did that he pulled my panties off and guided me toward the couch. I laid down and spread my legs while pulling my pussy open and told him I wanted him. He got between my legs and I grabbed his dick and guided him in. It felt so good going in and all I could think of was pumping hard. He was ready and started pumping hard and fast and I was fucking him back and yelling FUCK ME over and over. I don't know how long we were pumping but I came twice then he started grunting and moaning then he yelled and I could feel him shooting off in me and that made me cum again. When he stopped we were laying there breathing hard with his dick still in me thinking about a round two when we both heard something at the same time. We looked towards the door and Mr Cunningham was standing there looking at us! He said "Jimmy, I think you should go now". Jimmy pulled out, jumped up grabbed his clothes and ran out. When he pulled out cum started running out of my pussy. Mr Cunningham said "I'm surprised at you, Whart would your Mother say? You probably have gotten away with this if Brenda hadn't forgotten her inhaler. You need to clean up and get dressed." Then he left. I was so scared, what would he do? He must not have told his wife as when they got home Mrs Cunningham told him to walk me home because it was so late. On the way home I begged him not to tell Mother and Daddy because they would kill me. Mother would probably understand but I was really worried about Daddy. All he said was that he would think about it and we would talk in a few days before he made his decision. I don't know what to do. I can't imagine what Mother and Daddy will do when they find out.