When I was a teenager, I had horrifically low self esteem, as I was overweight, spotty, and bullied horrendously in school.
When I was 16 I decided enough was enough, and I went on a diet, started exercising, and started taking care of my hair and skin.
The way I looked changed completely. I was a totally different person. But inside, I was still the ugly, fat 14yo who got physically and emotionally bullied every single day of her life.
Then along comes a man, and showers me with attention, like I've never had before. We met at work (18 by this point) and started texting, and the attention he was giving me was like a drug. I had NEVER had that kind of attention before. He told me he was unhappy at home, and was going to get a divorce. He told me I made him so happy, that I was beautiful, and that he wanted us to be together once they finally divorced. He said I kept him going, and that we were soulmates.
I fell in love with him, he told me he had asked his wife for a divorce and she had agreed, but it would take some time, and he had to live with her until he could afford somewhere else.
We started sleeping together, as I was under the impression that his marriage was over, if not legally then at least emotionally for both of them. I was so, so in love, and thought my life was complete.
He said his wife even knew about us. Until I found out it was bollocks. She knew nothing, he hadn't asked her for a divorce, and had no intention of leaving. She ended things anyway, and he accused me of being an immature little bitch who broke his marriage up, and left me too.
So, although I knew he was married, these men can't half spin reality to suit them. I was absolutely heartbroken, and it's changed the way I trust even now.
Yes, I slept with a married man, knowing he was married. But MOST affairs aren't black and white, most women don't sleep with married men out of spite, or hatred for their wives.
Maybe I am a shitty person, I don't know. In hindsight, of course I wouldn't have gone near until he was actually divorced (which would have been never), but my only defence is I was young, inexperienced, immature, and - crucially - flattered as fuck.