Should I tell or keep my mouth shit?

Lastnight my SO and I we're hanging out with a few friends and got to talking and our guy friend started complaining about his wife. He was saying he's not happy and how he doesn't even want to be with her? He was drinking at the time so I don't know if he was just drunk and venting. I'm friends with his wife and not sure if I should tell her my husband told me to just leave it alone but a part of me thinks it's not right for her husband to bash her to our friends?