Originally Posted by Andrina
Well, it does happen. When I was a teen, two couples in the neighborhood began double dating. An affair happened, followed by divorces.
Yes, it's inappropriate for him to be confiding his problems with her instead of you. Does he call her daily/weekly about this? Sounds like an emotional affair.
I'd stop family visits with him. If you choose to continue the relationship, move it into a direction where only you two get together. I'd have a discussion with your wife about relationship boundaries, as far as communicating with him is concerned. Let her know you have a gut feeling he is into her, and that changes will be made to nip that situation in the bud. If she balks at not communicating with him regularly, she's prioritizing that "friendship" over your marriage.