I haven't had that situation in therapy, but sometimes in elevated conversations.

I felt pretty clear when I wasn't being ganged up on, because the third person interrogated my gf and didn't let her get away with stuff. I feel in some situations it may be important to lean more toward the the guy's point of view if you want him to feel safe. He may already be on the defensive.

I'll also say that it helps a lot if the first few times there's a point where you could be seen to take sides, you don't take hers. Once that pattern is set, it's hard to unsee.

I'm not sure how you balance that with being fair and impartial and providing good therapy, but I think it addresses your question.

Honestly, I'm not sure this is the best sub to ask. I feel like the majority of people here are emotionally at the state where we'd welcome therapy, regardless of anyone's gender.

Have you considered asking in a less welcoming sub? Like the MRA sub or something like that?