I reach round with my hand and tease her clit – once more she pushes down onto my fingers. My other hand is occupied on one of her rigid nipples. I can feel the beginnings of orgasm in my balls – there is a tingling going on, that is starting to spread up into my lower abdomen. Her breathing is suddenly getting shorter and deeper - I can feel her breast heaving and she pushes a hand back between her legs and grabs my balls, tugging at them. She grasps the sac just above the balls and squeezes it – almost painfully, and presses a finger into the area of flesh behind the sac, just in front of my anus. The sharp little nail digs in a bit and forces me as far into her as I can go. With a shudder and a gasp she comes, and that brings me to a sweaty and glorious ejaculation, depositing my sperm at the top of her young vagina. She stays transfixed on my cock for a while, as her orgasm subsides, and my cum starts to dribble from round the edge of her pussy, leaking slowly down her inside leg.
'What about my turn then, Uncle Stuart?' - we both leapt with shock, my dripping semi-erect cock slipping out of her with surprise. In our moments of passion and enrapturement, neither of us had heard the shed door open. Turning we saw older sister Louise silhouetted within the brightness of the door frame. Luoise is about 25, in her prime, with a drop-dead body on her. She was standing there with one hand up under her cotton print top, and the other lightly caressing her bush through the front of her denim skirt. We had no idea how long she had been standing there or how much she had seen, but she knew that she wanted some action too. I had always tried to treat them fairly as they were growing up, and Louise was not about to let me change that habit!
Sophie, was of course bright red with embarrassment at being caught by her older sister (not that I was exactly unflustered, with my recumbent cock hanging out of my pants), but Louise quickly said to her ' Don't worry – we can both have some fun!' She advanced towards me, lifting her top as she did, and I saw that she had no bra on, but displayed a superbly formed pair of medium sized melons, with nice erect nipples. Grabbing my hand she placed in on one of them, and put her arm around my shoulder, placing her full lips on mine. As she explored my mouth with her tongue, I felt a hand come up between my legs and start teasing my cock again – I realised that this must be Sophie, keen to maintain her advantage
