What a mess my wife had done?

Well. I will start out nice -- she is right, you don't trust her, at least I hope you don't. She sounds very narcissistic in that she is blaming everyone else for her mistake instead of taking responsibility for very poor judgment. I'm sure you want to believe in her innocence, but please, keep your eyes open and make sure you get that DNA test. I wouldn't trust this one as far as I could throw her. She is skilled at deception. I'd be keeping a close eye on her. Just giving you my opinion and I hope it all works out for you.