Does his wife know about this now?? Also why not show the picture to his wife and see if she recognises it? I am not joking! Look at the least she was have a EA (Emotional Affair) thru the texting and calling. She hid this behind your back. And to top it off lied about the extent when confronted. Major red flags!! Did they hook up? Who knows but No Contact from now on and she must be transparent.

How was your marriage during this timeframe? Sexlife etc! Did she pull away...thats a red flag.

How is she handling the situation now? Is she open to you or is she brooding?