I also told a few more people than I probably should have, as one should really expose to family and perhaps a best friend or employer, plus OM/OW's spouse.
I would tell you what I told myself -- and my wife -- and that is that I did EVERYTHING that I did in an effort to try to save my marriage, and to fight for my family. Don't beat yourself up over what was -- and is -- a noble fight.
The truth, and the consequences of her actions, are hers to deal with.