Had sex with the bride's Dad on her wedding day. Stupid mistake or am I a really terrible person?

Hey everyone, I'm a 26 year old blonde woman and recently I was a bridesmaid for a close friend on her wedding day. It was on a cruise boat for special events with around 100 people and in the heat of the moment during all the dancing and drinking me and her Dad (who is a 57 year old white guy) both went into... show more Hey everyone,

I'm a 26 year old blonde woman and recently I was a bridesmaid for a close friend on her wedding day. It was on a cruise boat for special events with around 100 people and in the heat of the moment during all the dancing and drinking me and her Dad (who is a 57 year old white guy) both went into a small cabin room downstairs by ourselves and had sex.

I only started to get to know him a few days before when I helped organize the wedding, but on the day he kept telling me how beautiful and perfect I looked for his daughter's wedding day and the sexual tension was there. We were both in a euphoric mood during the wedding and after many drinks we went into the small cabin room downstairs and had sex like crazy while everyone else (including his wife and the bride) partied upstarts.

Now I'm starting to feel intense guilt and remorse like I ruined my friend's wedding day and made it disgusting. The party was so loud I doubt anyone could hear but I keep worrying someone saw us and will tell his wife or daughter (the bride) what we did. Am I a terrible person for what I did or was it just a dumb mistake?
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