What kind of a person just ends a marriage without a valid reason?

I don't know. I was going to say it was possible that she was having an affair. But the more I read it doesn' t sound like that. You said she wanted another baby, could that have anything to do with it. Your therapist is right you do need to support her desicion, but I would ask her ?s when the son wasn't around. Just tell her you need some closure.