be in a loving relationship with your wife for years
you had actual mutual feelings with your wife and you lived happily together
caught her fucking some buff guy one day
she explains while she loves you, she loves that brown mutt more then you, had been with him even before you guys started dating and get married and hope you will respect her decision
what are you supposed to do? Just let that guy rob your wife away? Even if you somehow stopped her from seeing the guy she is just going to have him rent free in her mind.