my husband’s dad

Need to see if I’m as bad a person as I feel

Last week my husband was at work his dad came over to help drain the kids pool I been married 15 years and we have2 boys so I been in family long enough to be actually part of my husband’s family. Well he came over to help me tear down pool while kids were in school and husband was at work.
It was hot last week so both us sexy to take a dip before we drained it. He slipped on my husband’s trunks and I put on my two piece we played around awhile and we stayed in pool shut pump off and started draining it of course we hit beach ball back and forth the pool got sloppy as it drained and we started tearing it down when water was out

My suit never fit right I have a small butt and bottom always want to slip down. He teased me and stuck a coin in slot lol.
Well I guess it was innocent flirting but whe. We were all done it was about noonish we went inside and he tugged my bottom up and sissy keep showy that and I am going to tent.
I got embarrassed and laughed and said don’t make any promises you won’t keep. The conversation went down from there and he said you wouldn’t do anything and asked if I had been loyal not his son . I had been he said I know guys have to hit on you your still hot. More embarrassing comments but I went along but it had a effect on me I was teasing him back and said do I really make you tent in your shorts? He said of course I said no way your says that to trade me Mike would kill you if he thought his dad was looking at his wife lol.
I pull my side down showy my hip. I said like this? That’s a start he said we very get dressed on going to have to go he said and we walked down hall he was going to bathroom and I was to my room. He sloped his finger town my crack exposed in back and I jumped and laughed and said that was small not empressed . I whirlwind later he was with me in my room showin me his cock and it was more a dare game now right down to him putting it in me. Sorry to cut a lot out but it happened faster than o can type lol.
It was intense and aggressive we fucked with out a word but almost broke bed and he made me come secret times
I was dripping wet and as awkward as it started it felt weird him on me it was like we always been together time we were done panting in bed spent.
We probably was at it over a hour and I know that is not long but for firt Time it was mind blowing sex.
The taboo of it all.
Now idk I feel so guilty more worried someone will find out
And afraid he will want to again.
And afraid I will because like I said had not been with another guy for 15 years and my body took over I feel like I needed it so bad. Now I’m nervous as hell someone will find out.