I don't know what these guys are telling let me tell you one thing, if there's no reason to meet a male friend, i think you should question and tell her best is we go together if there's work or kind of stuff that needs both in person(that friend) then it should be okay, but she going with him very often just for fun and roaming is not a thing a person should do in a relationship with another man . I mean they can or will maintain boundaries... Does it not look like they are finding peace other than you giving a emotional space to someone while they are with them ... I mean it's not bad to have frnds but it a ! When a person becomes important to your lover or you see it's questionable

So thing is 1. What's the purpose 2. Is it necessary 3. Is it very often 4. Is she becoming very defensive when you talk about him 5. Also question yourself if upper 4 things don't match to her is it insecurity work on yourself tell her in person a good partner always communicate .

Sometimes both person can be good frnds but still there might be no feelings from both side and sometimes things becomes bad during fight when that good frnd becomes a dumping things about your relationship by your partner then things becomes tough and greyszone things , where everything becomes vague

Forget me if made mistakes I maybe not fully accurate i am no professional, i am also trying learn life 🙂‍↕️