It was just unexplainable. Then it happened. She happened. I looked down and saw my cute n crazy sisters lips making out with mine, but not my mouth l...ps. I sighed heavily. I had never felt anything like it before. Then she happened again. This time bigger. Her tongue had entered my personal area where only my fingers had half-explored. But tongues and fingers are very different as I found when she put in two of her own. I gasped for breath. Here I was, writhing and gyrating into my sisters. I never had or wore anything silky, and the feel was amazing. Kasey grabbed her sheets and blanket and covered us. Her final acts before falling asleep were to give me a kiss, wrap my arm around her, and spooned inside of me. My penis which never settled down nestled into the crack of her beautiful bum.Kasey fell asleep pretty quickly. I on the other hand struggled to fall asleep. My mind flashed back what happened during the day. I was so confused about the events and what transpired. I. .. and I could feel moisture from her pussy as it leaked out of her and ran down my butt.She poured more oil on my back and then she leant down and started to rub her glorious tits into my back. Up and down she rubbed ... I could feel her very erect nipples leaving trails down my back. My cock had sprung from slightly hard to rampantly hard in a split-second. For a 50 plus yr old guy, my cock was very easily aroused - its 9.5 inches long and 6.5 inches around. In layman's terms, it was very. Her first marriage ended in disaster and her father; Bob, who is my father-in-law, was trying to get her a job at his software company. He didn’t own it but he has a lot of pull there. So he gets her a job in his division, which is sales and they try to train her but she doesn’t do well. The people are nice and they do their best, but she has no education and no knowledge in this computer stuff. She tries hard but people are getting impatient and she thinks she should just quit. But her dad.