We would have breakfast together every morning; and I would call her several times during the day and we would talk briefly. She would be home most da...s when I got back from Uni; with the exception of Wednesdays, which was her night for lectures at uni. There was something very comforting about getting home from work, walking into a house that I owned, and hugging and kissing Lisa. We would talk about our respective days, the things we did, problems we had to sort out, and things we wanted to. We were lying on an inflatable mattress enjoying the sunny morning when Valentina, my sister, told me to move it towards the wooden fence.“Why do you want me to move it?”“Just do it,” she commanded.As soon as I did, she pushed me so that I lay down on the mattress. Then, she took off the bottom of her bikini and put her pussy on my mouth. I understood why she had made me move the mattress. If it was very close to our tall wooden fence, our neighbors would not be able to watch us.I licked her. Licking her was different because I was actually awake for it. I could feel her various movements to my stimulation. Crystal liked her clit played with and the harder the better. Before I knew it I was crewing on her clit with my teeth and she screaming out that I was giving her multiple orgasms. Soon Karen was crying out too and I realized that I was filling my sister with cum.Mom asked, “Was it worth the wait?”Karen replied, “It sure was! I’m so glad you talked me out of letting Charlie fuck. "What the hell! Lilly, stop that!" Chrissy twisted her hips awayfrom Lilly and lost her balance as she tried to take a step back butDerek's boxers were tangled around her anckles causing her to fallonto her back and side. Chrissy glared up at Lilly who was nowlaughing."Oh, my, god, the look on your face. Hehehehehe." I'm glad you're having fun!" Chrissy stood up and realized for thefirst time something every guy learns as they grow up. Gettingdressed while sporting a hard-on is difficult..