I slept with a trans mtf girl while married
You have confessed something very personal to me. Is this because you trust me or wanted to come clean to someone at random? Any other reason behind it?
Guilt. The biology between us doesn't matter at all but what I did was wrong.
I hope you have learned that it is wrong, although many people do cheat. It seems like you have a lot of uncontrolled feelings to attend. You know what would help with that? Therapy, and am not saying it in a bad way.
Are you a male or a female?
What does it matter? I'm a decent human being and that's all that matters with anything. I would not cheat but you are free to do what you want.