I hope you enjoy this 100% true story.
Growing up, I had an aunt, a single woman who was curvy and sexy, with lovely large tits and a nice round bum. Whenever visiting her house, I would usually have a rummage through the dirty washing basket in the bathroom, sniffing her panties or putting on her tights and wanking my stiff cock until I came. I'd sometimes get a chance to have a quick search in her underwear drawer too, sniffing her lacy bras and on one occasion the crotch of a black basque.
As a teenager I fantasised about her often, partly because one day when I was about 13 or 14, we were on a family trip to the beach, my aunt had wrapped a towel around her to change out of her swimming costume when a small breeze blew the towel open at the bottom and I had a close-up look at her brown pubic hair framing the pussy I'd wanked to many times.
A couple of years later, when I was around 15 or 16, I was staying at her house one night, and she'd made a bed up for me on the sofa in the living room. After she'd gone to bed, I got up and sat on an armchair, naked and aroused, and began to slowly masturbate, thinking about how good my aunt's cleavage had looked in her tight top that night. I had put the lights out, but left the curtains open, so the room was dark, but dimly lit.
After a few minutes, I got a shock when the door slowly opened and my aunt stepped in asking if I was OK. I stopped wanking in fright and took my hand away from my hard cock. I could see her looking towards the sofa expecting me to be in bed,then looking towards me. She seemed to stop and stare, as though not quite sure what she was seeing in the very dim room.
I began to wonder with a mixture of fear and excitement if she would turn the light on and see me sitting there naked and aroused, my hard penis pointing up in sexual heat.
As she gazed toward me, I became more turned on and could feel my cock growing harder. I sat in the armchair, legs pen and with my erect penis fully on display, she asked if I was OK and I said yes, she said 'OK, good night then' and left, but not before looking over at me again.
Because of the darkness, I've never been quite sure how much or how well she could see me, did she just see the outline of me sitting there, could she see that I was naked, did she see my hard cock?
Anyway, after she left the room, I grabbed my rock-hard cock and wanked furiously, coming soon with an intense orgasm and ejaculating lots of warm spunk all over my cock and thighs.
It wasn't mentioned in the morning, and has never been since, but even now I still occasionally get turned on and masturbate thinking about that night.