I guess I had the usual childhood growing up with an older sister. I remember that all of a sudden Emily needed her privacy and certain things we used to do like fool around in the tub together were no longer allowed. For a while she was not very nice to me, but then, right out of nowhere she started to be really sweet.
So one day I was in the hot tub minding my own business when Emily came into the cabin and started to just chat. She said it looked nice in there (This was the middle of winter and snow was on the ground outside) I said it was great and I loved the crisp air and the hot water. Then she just stripped to her panties and hopped right on in.. worse than that she sat ON me.
Now while I had been in there on my own I had been getting horny and she sat right on my hardon. OK I had swimming shorts on, but even so, she couldn't have missed it, and she didn't.
She looked right into my eyes and said 'You horny little fucker' Now for Emily to use such language was unheard of.
Then she just started to move and squeeze me with her ass and I knew I wasn't going to hold off for long, especially when she took my hands and made me cup her small but very firm breasts. Suddenly I blew my load into my shorts. She must have felt each twitch.
Then she took my hand and put it into her panties and showed me how to finger her. She didn't have any hair there, which surprised me then, but now I know she shaved it, of course.
I remember feeling her slick pussy even though the water was kinda slippery, her wetness was different. Then she guided my finger inside her and the next thing she was muttering 'OHH fuck, I'm gonna cummmmm.' And then it was my turn to feel every twitch.
We stayed in the hot tub all afternoon and did more things... things I can't say here.
Thing is, it always felt really horny with Emily, far more sexy and dirty than with a girlfriend. Emily said that she enjoyed the couple of years we fooled around with each other too.
We are older now, but having talked it all out we did things with each other we never dared do with a partner. I used to love it when we just sat together, sometimes in the bath with NO water, sometimes on the lawn and Emily would pee gently into her panties and onto me. That used to turn her one like nothing else. I also liked it when she would ask me to pee onto her clitty which always made her cum loads. I have no idea what suddenly made her want to have some fun that day, but whatever it was, I am sooo grateful.