[genedad]

We got back home and our suits were still wet. Dawn did not want water all over the apartment and told us to remove our suits before going inside. We lived in a garden apartment complex with a common door into a small ante room. Then there were two doors, one leading upstairs and one leading to our apartment. The three of us were standing in this small anteroom when Dawn told us to strip. She peeled her one piece off and held her hand out for our suits.

"Stay here while I get you a couple of towels to dry off." She walks into our apartment and closes the door leaving Danny and I naked locked out standing in this little foyer. She left us there for what seemed like forever but was probably three minutes. She opened the door and handed each of us a towel. She was still nude and apologized. She said she had to pee before coming back to the door.

Dawn was 20 years old by now. I was thirty and we had had many sexual adventures since she graduated high school.The incident with her brother, Danny , was two years in the past. Her body had not changed. Nor had Danny's reaction to seeing his sister nude. He had an erection. So did I. Dawn grabbed us by our cocks and sat us on the sofa.

Danny started asking questions about our sex life. I told him of our adventures with both men and women. I explained how each of us tended towards a dominant role when adding a third party of the same sex. Dawn tended to dominate me and the other woman in a MFF, where I was in charge if other men were involved.

"So you were really okay with what happened today on Uncle Bob's boat? It didn't bother you at all?"

"No it didn't. If I didn't want it to happen I would have said no. Your sister wouldn't do it without my permission because that would be cheating. Don't you remember what happened with you two years ago?"

"Yeah but I just figured that happened because everyone was drunk. I never thought you two would do that sober."

Dawn had been sitting between us on the couch as we had this discussion. She was pulling her nipples and slowly running a finger through her slit. She started inserting her finger , slowly fucking herself. "You are going to see a lot going on between Gene and me while you are here this summer. If your not comfortable with our sex life, maybe you should stay with your brother, Marc."

"No I want to stay here with you guys. I promise not to sit in judgement."

I told him more of our adventures, including how his sister spent an evening turning tricks for Uncle Bob and his friends. He again asked if I was okay with all of that. I told him most times it was my idea. Dawn liked my imagination and always wanted to see what was next.

"So Danny , do you want to sleep on this sleeper couch by yourself while staying here or do you want to share our bed. Understand that your sister and I sleep in the nude and you would have to do the same."

Okay an 18 year old is given a choice between sleeping alone on a sleeper couch or sleeping with his 20 year old sister. What do you think he chose?

With the decision made, Dawn grabbed our hands and led us to the bedroom. We laid on the bed with Dawn in the middle. She had a hand on each of our cocks as Danny and I lay on our sides. We started playing with Dawn's tits and Dawn took Danny's hand and moved it to her pussy. She put his finger inside and started to move against it.

"What was your favorite part of our time two years ago?" She asked.

"Well you and Gene gave me some great advice regarding Emily. In fact, we have taken a break since she went off to college and I am going in the service. We even had sex with another couple in the room after prom. You also gave me a great blow job and I liked you playing with my asshole. Although I was worried for a minute that because I enjoyed it I was gay. But my favorite thing and the reason I wanted to stay here this summer was Gene telling me that I could fuck you as a graduation present."

I didn't recall saying that at the time but looking back in sure I did. Once again I went over that line trying to impress someone.

Dawn said,"Well Gene normally doesn't let other guys in my pussy. He has on occasion but it doesn't normally end well." The look on Danny's face was like someone killed his puppy.

"Look Danny, if I let you fuck your sister, we have to have an understanding. You only do it when I am here and you continue to treat both of us with respect."

"Gene, I always would. You're like a older brother and I appreciate everything you do for me."

"Can I fuck him now? I am so horny I want a cock. Please let him fuck my pussy," dawn begged. I nodded yes and Danny rolled on top of his sister. This was really hot as these two had a real resemblance. They could have been fraternal twins if it wasn't for Danny's bright red hair. His pubic hair was still just as red. Dawn reached between them and put the tip of his cock inside. "This is so cool. I'm really fucking my little brother. Thank you honey," she said to me. "I'm going to want his cock again."

I was caught up in the moment. I'm jerking off at the sight of these siblings fucking." Tell you what, while Danny is living with us I will let him fuck your pussy. Each night you can have your choice of cock."

"So we can finally try a DP. I always wanted a cock in each hole but you wouldn't let me."

"Whatever you want."

"Right now I want to finish fucking my brother. Stop jerking off and put your cock in my mouth. I want to eat your come while he comes in my pussy." One of my reasons for not letting guys fuck her pussy was fear of pregnancy. Now she wanted her brother to come inside.

I put my cock in her mouth and Danny continued to fuck her. He shoved his cock deep inside and came in his sister. As he pulled his cock out you could see his come on his shaft.

"That is so hot. Your little brother came inside you. You are the best sl ut ever. He is going to use your body all summer." She is playing with her pussy, rubbing her brother's come all over her clit. I can't take it any more and shoot my load in her mouth. That does it for Dawn and she squirts. Dawn released more fluid when she came than any other woman I've ever met. Danny never saw this before.

"That was awesome."

"Welcome to your dream summer."