My neglectfulness didn't justify what she did, but put her in a position to be vulnerable to the temptation to do what she probably did. I do not take blame for her choosing to do it. I take blame for putting her in the position to be interested in doing it. It's something I have to accept to keep this from ever happening again with her or anyone else.
^ This. Print this out and post it where you can read it every day if needed. No failings in a marriage justify an affair. Don't take the blame for it.