Helen opened the bathroom door and I heard her walking towards her room, oblivious to the fact i was in there. As she walked in she was still dripping...wet from the shower and only had a small towel wrapped around her. She looked over to the bed and saw me laying there and wow did she smile.My naked sister came running onto her bed jumping on top of me. I felt the cold water cover me as she climbed on. Moving her hair back she starting kissing me, which I gladly returned. I pulled Helen closer. I shot a jet of urine right at her cunt. She jumped and gasped, her eyes and mouth wide open in surprise. I focused again and squirted another jet of piss that splattered into her distended labia. Again she bucked and cried out, "Aaah!" and threw her head back.I struggled to relax my prostate, and was able to achieve a stream of urine. I peed straight onto Marion's cunt as she wailed in delight, squirming and writhing in joy.I flexed my stomach muscles, and my bladder opened up fully, my. I had planned that at some point i would ‘need’ for her to go and get me an urgent part from the DIY store, and that I needed to stay to ensure no water leaks. She got ready and set off, a journey of about 5 miles each way so I gave myself 30 minutes of time. I watched her drive well down the road and clearly on her way. I hurried up to her bedroom and caught my breath after all this time I had made it in to her bedroom though on my own. I looked in the first drawer but it was not it, then the. “Oh, God! That feels so good!” I cried as my body arched beneath him and my pussy squeezed his deepening shaft.“Mmm, I like your nice tight pussy, honey. I’m gonna fuck you until you sing,” he promised and began thrusting into me.Oh, he had a big long shaft! And he was giving me every inch of it. I hadn’t felt that full of cock in a long time. I wrapped my legs around him and started humping back while clawing his back with my nails.“Oh. Yesss! Oh! Yesss!” I cried. “Fuck me, Ben! Fuck me.