I thought I could just lie there quietly and go to sleep without an orgasm. My pussy had other ideas.
A couple nights ago, my sister and I got together for takeout and movies, and we both ended up taking way too many edibles. We hadn't planned on a sleepover, but we definitely had no other choice!
My sister is one and a half years younger than me, and we've always been very different. She's the beautiful one, outgoing and flirty, a delight in all social situations. Next to her, my shy awkwardness is even more apparent. But I know in spite of her flamboyant flirtiness, she is a total prude deep down. What she doesn't know is that in spite of my shyness, I am a desperate slave to my intense libido.
As we fumbled around getting ready for bed, I was worrying. I hadn't shared a bed in a long time, and I never go to bed without a (usually lengthy) masturbation session. I was pretty sure I would be able to fall asleep without touching myself, although I was a little disappointed to not be able to take full advantage of the delicious stoned state I was in. I did my best to put it out of my mind.
We climbed into bed and collapsed into the pillows. I laid down and tried to get comfortable, but it was impossible. My pussy was throbbing for attention. I could feel my clit swelling, my lips engorge with arousal, my wetness seep all over my aching swollen pussy.
I stretched out on my stomach and pressed my face into the pillow, breathing deeply. I was convinced that I could just relax every muscle and pass out quickly. I knew my sister was still awake as she shifted around every few minutes. I didn't want to clue her in to the frenzy of arousal I was in.
Even as I relaxed my body and tried to keep every muscle still, my cunt still pulsed harder and harder. My body was absolutely dying for its nightly pleasure and was not comprehending that it couldn't happen. The wetness kept flowing in slow, steady waves into my underwear, drenching the fabric. I felt hot and slippery and aching and ravenous. But I kept myself motionless. Without being able to tighten the muscles in my legs and thighs, I assumed I wouldn't be able to orgasm, so I figured staying still would solve my problem.
But suddenly it started to build. Even with my body limp as a ragdoll, my breathing slow and even, the tightening in my pussy grew more and more intense. In my overly-stoned mental state, every twitch of my cunt felt heightened and agonizing. As my panic mounted, so did my climax. Without any movement at all, my clit swelled and throbbed, my pussy contracted and gushed wetness into my panties. The throbbing and pulsing and aching went on and on and on, so much longer than any other orgasm I'd ever experienced. Keeping my body still utterly limp, I floated through that endless climax and breathed gently through the gushing contractions.
It took forever, but finally it was over. I was absolutely mindblown; nothing like this had ever happened to me before. My brain was drowning in sex endorphins mixed with the high I already had. It took no time at all to drift off to sleep. The next day my sister didn't say a word about it. But she's so prudish, I don't know if she would mention it even if she knew the whole time. I wonder if she could tell, in spite of my best efforts at being discreet, that I was involuntarily cumming my brains out in the bed right next to her?
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