Maybe instead of fighting with her over her friend. Talk to her how it make you feel. Talk to her without accusing her in some sort of way.
I don't completely agree of her having a male friend, doesn't matter if she needed some kind of suggestion or advice from the opposite sex. If for some reason she needed a male version to give her the wisdom of advice, I still believe that she should come up to you first as her husband or find a therapist that might help her. But then again, this is my own opinion.
Trust is a fruit of a relationship in which you know you are loved.
I don't completely agree of her having a male friend, doesn't matter if she needed some kind of suggestion or advice from the opposite sex. If for some reason she needed a male version to give her the wisdom of advice, I still believe that she should come up to you first as her husband or find a therapist that might help her. But then again, this is my own opinion.
Trust is a fruit of a relationship in which you know you are loved.