My point is that if he cannot accept her falling in love or deeply attached to another man then this would not be the place to seek advice. A swingers board or a message board about NSA sex would be more appropriate. This message board is in support of people having loving relationships with more than one partner.
The OP has a problem with his wife falling emotionally for another man.
40 yo straight female
Married in the eyes of the government to Butch since 2001...
Murf my monogamous second husband has been with me since May of 2012.
In a V relationship with an average 60/40 split of time. Only due to Murf's and Butch's crappy work schedules.