When I was 21, I joined a (female) friend from university to her dad's holiday house. It was a great house near the beach and a pool in the yard. We stayed there for little over a week with her dad, brother and a friend of his.

During the first days I teased her brother and his friend by showing of my body. It made me horny and the second night I seduced my friend and we kissed, fingered and licked each other.
The next day she went shopping with her dad and I was hanging around the pool in small bikini bottoms. The boys, who were 18 years old, tried not to gaze at me too much, but couldn't keep their eyes off of me. They tried hard to cover up their boners, but I clearly noticed them.

When they were in the pool trying to let the blood swirl out of their cocks, I dived in the pool and swam to my friends brother. I gropped him in his crotch and released his penis. I started jerking him in the pool and shortly after I was having a threesome with the two boys next to the pool. They were horny as hell and both unloaded multiple times in my mouth and pussy.

I confessed to my friend who was not very amused about me doing her brother after we had sex and she wasn't in for more lesbian action.

On our last day she had to drive her brother and his friend somewhere and I was alone with her dad. He was reasonably good looking and was in his late forties. I was playing around in the pool topless and he got turned on by me. He was divorced and I was horny. When I got out of the pool I walked his way and stood right next to him. He was staring straight to my hard nipples and wet breasts and was getting uncomfortable. I kneeled down and without asking, I brought my head to his crotch, pulled down his shorts and started blowing him.

It had been a long time for him and didn't take him long to fill my mouth with a very large amount of cum. I swallowed it all, but he stayed rock hard. He put his hand on my hips, directing me towards his cock. I dropped my bikini bottoms and sat down on him. I climaxed shortly after starting to ride his dick. Thereafter he pounded me really hard and creamed my pussy.

Just when we were finished, we heard the car returning. I quickly put on my bikini bottoms and dived into the pool like nothing happened.
Given her reaction on me doing her brother, I decided not to confess my sins with her father. I don't think she had any clou that it has happened ;-)