Damn, I really fucked up this time

I've known this girl for about 12 years and she was married for most of the time. About a year ago she left her husband and not long after that we started seeing each other. During that time all I ever heard was how she couldnt stand her husband and there was no way she would ever go back to him.

Then about 2 months ago I noticed she started talking to him more and in a much nicer tone, and was complaining about money problems so I knew what was coming. By then I was completely in love with her but I know you can't force someone to stay with you so I accepted the probable outcome. I asked her if she was thinking of going back to him and she told me she was thinking about it because of the kids and financial reasons, but she didnt know what to do because I was the one she really loved. I told her she should go back to him, I knew if she did it wouldnt last and I didnt want to be with her if she wasnt sure if it was the right decision.

So over the past 2 months she has been going back and forth between me and him. Even though I knew it was just a matter of time I figured I would enjoy it while I could. The whole time she would tell me she's confused, that she never loved anyone like me, she can't let me go, and that she can't even stand being touched by her husband.

Then a few days ago her husband calls me and tells me that she's been telling him the only reason she talks to me is because I help her with her bills, which is untrue, and she's been telling him how much she loves him and can't stand me. Basically everything she has said to me about him.

I was devastated someone I thought I knew so well and loved could be so deceptive. So I printed out all the chat logs between me and her for the past few weeks (about 30 pages) of her telling me how she loves me and he makes her sick, etc...all kinds of good shit. Then I faxed them to the business he owns where his most of his family works, including his mom, for all to see. Well they all saw the fax.

Even though a part of me thinks she had it coming I now feel like shit for doing it. Whether or not she loved me is irrelevant, I loved her and should not have tried to fuck her up no matter what she did.

Am I wrong for feeling bad about this?