After the fun evening Sally and Sharon had showing George the fun in the pool it was a no-holds-barred progress to the following.
On a Friday evening about two weeks after the pool fun, Sharon and I were out to a movie and before entering the theater we saw Sally and George walking through the mall that contained the theater. We stopped and talked with them a while about just general stuff. We told Sally and George that we were going to the movies and invited them to join us. They refused and said they were doing some shopping and would be home when we arrived after the movie was over. Well, Sharon and I watched the comedy movie which was not to good.
About three quarters of the way through the movie Sharon leaned over and whispered in my ear, "Let's leave now a little early, maybe we will get home early enough to catch Sally and George having fun." With that, we left the movie and talked about Sally and George as we drove.
Sharon told me of the fun in the pool with George and Sally and said it was fun showing George how to relax about the act of having sex. Sharon also touched on how Sally enjoyed sex very much now since the first time with the two of us. We both hoped George was still at home with Sally and we were hoping to get some foursome action going if the two were there. Sharon unzipped my pants as I continued to drive and started to slowly give me a blow job. Needless to say we continued to discuss the foursome and the action Sharon was giving my cock, got me ready to shoot a load off really quickly.
Well, Sharon just brought me to the edge and would stop and talk about the fun she wanted to enjoy with Sally and George. We arrived home before I came and Sharon commented that I should save my cum and enjoy my hard on with Sally and George. As we pulled up we saw George's car in the drive and we knew we were in luck for some fun. The only light on in the house was in Sally's bed room. That indicated they both were in the bedroom and we were correct. We were quite entering the house and we went to my bed room. Sally's bedroom was directly over mine and we listened for a while and we could hear the bed moving and a faint groan from Sally. We were in luck Sharon really got horny listening to them screw and wanted to go and join them.
I told her to wait until they were finished to let George enjoy Sally alone so as to get them both relaxed. We were, all four of us, young enough to recover from a sex session and enjoy again quickly and I was banking on the recover to accommodate us to get George and Sally going again. We continued to listen and while we did took off our clothes and laid on my bed getting horny with each other as we played with each other and listened. Well, about one half hour of this and the bed started to move faster and Sally moaned louder and we heard George say "here it comes, here it comes."
Little sister and George were in the middle of there orgasm and finishing off the splash down. Then the water went on in the upstairs bath and we heard some one coming down the stairs. Then a brief knock on my bedroom door and in walked Sally, totally nude. She asked how long you guys been home.