Yeah, it makes perfect sense - because undoubtedly what he's been telling her (that your marriage was dead years ago, that he was only staying for the sake of his son, etc. etc. - the usual B.S., I'm sure) didn't match up with his loving and appreciative responses to his loving wife. And now she's realizing what an idiot she has been - and H, I'm sure, is feeling guilty for having mislead her (although I'm sure he believed it at the time).
Just keep your eyes on the road. Don't diss the OW to your H, stick to the high road, don't sink to her level.
