Polyamory

I recently started a new relationship with a married poly man. His wife is not poly and doesn't understand his being so. She still has the "why am I not enough?" mindset. She knows he has met someone else (me) but I have not met her. I know he loves her greatly, and ideally he wants her to be able to accept his being poly. He does not want a divorce, but knows it will happen if she can't accept his being poly.

He asked me last night if I would be willing to meet her and talk to her, if she were also willing. He thinks maybe a woman's perspective would help her understand better his poly nature, and to be more comfortable with it. I'm not sure what to do.