Skinny Dipping

I use to go skinny dipping in my grandfather's pool after school because I would be out of school for ffa. Well my junior year one day I was skinny dipping and I was underwater and swimming and when I popped up my grandpa yelled at me and I quickly pressed up to the side of the pool trying to hide myself but my clothes were piled right by the stairs where he was standing. He told me to get out of the pool immediately because he wants to talk about why I think it's ok to come over and skinny dip in his pool whenever I wanted. He told me he had seen me several times just never knew how to handle it. So I slowly moved towards the stairs trying to keep covered and he said he's already seen it all so no need to cover up now. So I just got out of the weather quickly and grabbed my clothes, he started asking how much trouble would I be in if he told my parents, I would be In so much trouble for skipping my FFA duties and skinny dipping. That they'd ground me and take my car. I promised I would never do it again and that I'd greatly appreciate and owe him if he wouldn't tell them as I stood there clothes pressed against me covering me. He looked me up and down saying I was asking a lot of him that could end up fucking him in the long run, which is risky for something he ain't fucking. I said I know but I'll do whatever he asked no matter what as long as he wouldn't tell my parents. He thought about it and told me to drop my clothes and don't cover up so I did he looked me up and down and went and sat on a pool chair and undid his pants and pushed his pants and underwear down to his feet and asked if I was that willing I slowly walked towards hmm and kneeled in front of him and grabbed his cock and started stroking him getting him hard as he sat back in the chair. I sucked him for about 10 minutes before he came, which I swallowed. He was still hard though when I stood up so I turned around and sat on it! Still don't know why he didn't ask me but I wanted to I rode him for a while surprised myself by cumming several times. But he is built like a water bottle. His second cum took so long. And we stayed quiet the whole time! It was so hot though when I got up and put my clothes on and walked home feeling his cum in me. Up until I went to college we probably fucked another 15 times. And haven't since but he was much younger then I don't think he'd be as good now