In the spa

I was at my in-laws last week and had the place to my self for a few hours so i went to lay out by the pool. The warm sun felt great. As I was laying there I started thinking about one of my sister-in-laws. She has a fantastic chest! After about a half an hour I was getting really horny. my cock was growing more and more in my swim trunks. I was reaching down and slowly rubbing my thumb on my bulge. The spa was just a few feet away and I started thinking about how great it would feel having the jets pulsing against my cock. The more I thought about it the hornier I got. Then I finally figured "what the heck".
After getting in the water and making sure no body was around (it was the middle of the day) I slid my trunks down just enough to expose my cock and balls. I started by sitting sideways by one of the jets. I held my hard cock right by the jet letting the stirring water message it. I kept on checking to make sure nobody was watching, even though I kinda wish someone was. I was imagining my SIL catching me from the house. Rubbing her sweet little pussy as she watched through the window. Then I turned and faced one of the jets until it was hitting my cock juuuust right. Wow it felt GREAT! My cock bobbing and bouncing until I couldn't take it any more. Then a huge rush came over me and came harder than I had in quite a while. My cum spurting into the water and just cumming and cumming. Wow, talk about relaxing. Releasing a huge load and getting a message in nice hot spa.
If anyone is interested I'll tell you what I did with the pool sweep.