A long time ago I was dating a lovely nymphomaniac. We'd been together 3 months and were still in the can't get enough of each other phase. Her whole family decided to go stay in a caravan park along the great ocean road, so we thought we'd join them for a couple of days before continuing, on our own. We got stuck sharing a van with her little sister. Worse still the beds in the van were bunks, double mattress on the bottom and single on top. I was thinking to myself "that's it, no playing for us."

Her sister was sound asleep when we decided it was time for bed. My gf turned off the lights climbed in to the double with me and spooned herself against my chest. A few minutes passed and she started to grind her delicious ass playfully against my lap. At first I thought "surely she's not thinking about that?" But the grinding quickly became that very insistent rubbing a woman does when she wants to make her desires known. It had the affect she was looking for and my cock started to swell and throb within my boxers. When she had my full attention, she reached inside my shorts and started to stroke me, turning her head to kiss me deeply, leaving absolutely no doubt as to what she wanted.

I covered her mouth with my hand leaning forward until my lips brushed her ear to whisper quietly "Remove your knickers and don't make a sound!" She smiled her cheeky smile back at me, her eyes flashing in the dark and did as she was told. I slipped my boxers off and ever so gently pressed myself inside her. There we fucked as slowly as we could. It was almost painful to restrain myself on each stroke, neither of us moving more than a mm at a time for fear of making the bed creek and waking her sleeping sister. It was the slowest we ever fucked and it was glorious! Feeling every moment of every stroke, burning with desire but having to hold back.

It's at this point I should mention she was a screamer, a loud one. As we lay there, hips grinding ever so slowly against each other, I see the familiar look of abandon come over her eyes as her release starts to build. She rolled on top of me and I wrapped one arm around her body, pinning her tightly against me as she ground her clit into me. My free hand wrapped around her throat squeezing hard to stop her screams. It wasn't enough.

To muffle her cries she bit down on my shoulder orgasm rolled through her shuddering body. After she regained her composure she finished me off with her mouth, swallowing like the good girl she was. All this time her sister had been no more than a meter above our heads. We thought we'd gotten away with it all.

At breakfast the next morning her little sister asked what the nightmare had been about. Looking confused my gf asked what she meant, to which she replied "Well I heard you crying in your sleep last night so I figured you must have been having a bad dream." I also had to wear collared shirts for the rest of the family time to hide the black bite shaped bruise on my neck!