I can remember when I was about 13 or so my cousins Jenny and Zoe would hang out at our place. They were 13 and 14 and I began to get boners around them especially in the summwer when they wore next to nothing. They would play this wrestling sort of game which involved them tying each other up, before they did they would wrestle about, sometimes they would drag me into the fight and I soon realised they were using it as an excuse to feel each other up. I got really hard and they would grind against me and a hand would touch my rigid cock, sometimes I would just watch them, their hard pointy nipples poking through their t shirts, flushed faces and legs locked around each other, grinding their crotches into thighs, they often wore shorts and I'd get a flash of their panties if one of them held the other ones thighs apart, so wide the crotch piece of the shorts would slide up making their panties bulge out.
The whole time my cock would twitch. One time they started tying each other up and they would have their hands between their thighs trying to get the rope down there, when they eventually did they would tie the rope up so it ran between their thighs giving them a tight wedgie and I'd almost cum watching them grind their pussies into the rope. One afternoon I actually spurted in my shorts as they wrestled in their swimsuits, sweet bulging pussies throbbing with all the accidental touching.