I was flying business class back to the UK from Singapore recently where'd I'd be on some work conferences. The seats flatten out to make beds and it was an overnight flight so after the meal they switched off the cabin lights and a lot of people settled down to try and get some kip.
I lay there for an hour or so, there was nobody in the seat next to me but there was a guy across the aisle, probably mid forties, typical businessman type, flying in a suit (why anyone would do that is beyond me) etc. I was struggling to fall asleep and I really wanted to make the flight go a bit quicker by sleeping so I put on a film (Notes on a Scandal). There was a bit of a raunchy sex scene between the schoolboy and his teacher in one part, and having always had a thing for school uniform, I could feel myself getting wet and puffy under the blanket. I ignored it for a few minutes, but I was getting more and more horny and my pussy was starting to tingle, so I glanced about to check nobody was watching and pulled my skirt round my waist under the blanket to feel the outside of my knickers. I was soaking wet, and the mere stroke was enough to make me shudder.
I couldn't resist any more and began rubbing myself through my knickers. I was lying on my back in clear view of anyone coming down the aisle, the rhythmic movement of my hand moving the blanket slightly. Usually it takes me about 10-15 mins to reach orgasm but I was so aroused by the public place that within 2 minutes I was edging. I turned on my side and curled up, hand still between my legs. My breathing was heavier but I was trying not to make any noise, and then I felt my pussy contract all it's muscles. I pushed the crotch of my knickers aside, shoved a finger inside and pressed my g-spot hard as my thumb circled my clit. The sensation was overwhelming and an involuntarily moan escaped my lips as my whole body shuddered. I could feel cum dribbling out into my already soaked underwear and all over my hand and I kept rubbing my 2 most sensitive spots. It felt like the orgasm would never end but eventually it calmed and, panting slightly, I opened my eyes.
The guy in the seat across the aisle was now sitting up, and watching me intently. He was gripping his cock through his suit pants. I guess he heard my moan. I was petrified but at the same time thrilled that he'd watched me cum all over myself, and feeling a bit daring, with my hand still in my underwear, I lowered the blanket and looked at him for approval. He nodded and closed his eyes, still squeezing his cock, and when he opened them a few seconds later I was masturbating again, this time without my cover.
It only took about ten seconds of him watching this to unzip his pants and pull his rock hard cock out of his pants. He began jerking himself furiously and I rubbed my now very sensitive clit from having just cum. Thirty seconds later he grunted and shot four loads of cum onto his shirt. Once he had finished he shoved his cock back into his pants and lay back down, winking at me. I covered myself back up and turned onto my stomach, and masturbated until I fell into a peaceful sleep.