As she rides me I can feel my climax building. “Fuck Caylee I’m going to cum soon.” “Fill my ass with your cum Chase.” I started to cum hard... Hard and long. It is amazing, cumming in my little sisters ass on a public beach. When I stop cumming, she lays back on me and we kissed long and deep. Then she stands up and goes and squats a little way away and squeezes my cum out of her ass. I stand up stretched and go over to her and pull her up and kiss her then pick her up and run into the water. She was using just two of her fingers and unlike the magazine the girls in magazines, she was just slowly rubbing them around in circles up at the top of her pussy. I watched as she would slide them down and get them wet and then slightly part her fingers, trapping a little bit of really pink flesh between her fingers and then she would slowly slide them up and down just a little or move them in circles as her other hand squeezed and caressed her breast.I had never thought of my Grammy as being. “They’re really something.”In a moment of utter cockiness, I called to the girl in the flannel skirt.“Ms. O’ Brien! What’s your first name?”She and her friends looked toward me, perplexed.“Janis…” she said eventually. “Hi.”I raised my beer.“Great to make your acquaintance, Janis.”“Yeah,” she said, sort of smiling. “Same.”“You ladies get home safe,” I said.I can sound like a dick if I want, like a smooth operator if I want, like a drunk teenager if I want (which is being myself), or like a cop,. "Mum," said Jean, my younger sister, "can I go with Dean, stay at his place?" Sure, dear," she said, "we'll see you both for Sunday lunch." What's that?" I said, for this was the first I had heard of her plans."It'll be so cool to stay at your place," she said. "I won't be any trouble." Ok, sure," I agreed.On thing about my younger sister, she sure has changed in the last year. Never the thinnest of girls, always a little bit cubby, but, my, how she has shot up and her tits sure look a good.