My friend's wife is constantly threatening him about suicide. how to deal with it?

My friend’s wife is 7 months pregnant and he just mentioned that his 6 years marriage is very rocky. His wife is manipulating him often that she’s gonna commit suicide or she’s gonna go to TV to complain that he’s harassing her.

He’s just worried about the baby to say something to her. He’s worried that she’s gonna harm the baby if he calls cops or to take her to a therapist. He’s also afraid that she’ll call 911 for no reason and complain about him.

My friend still wants to save this marriage but he couldn’t bear this threatening/manipulation any more.

I asked him to approach an attorney and get some legal advice/direction.

Any advice is really appreciated.