I slept with a married woman once when I was in high school, am I a horrible person?

Let’s just say that the married woman had issues with hitting on some of his sons friends. Most of which seemed to be older but I happened to be 17 at the time. I don’t know if this makes me a horrible person still at 20 years old, even though I don’t want to cheat or sleep with a taken person again.

(for those wondering, they got divorced)

I slept with a married woman once when I was in high school, am I a horrible person?
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