I think your wife is being manipultive.
There are people who threaten suicide, to get their way.
Your wife uses divorce.
Suicide you have to be careful.
Divorce, you can try to call her bluff.
Find out
IF she is serious.
IF she is manipulative.
IF she is just frustrated.
You have a 2 out of 3 chance for divorce.
Anyway, a seasoned divorce lawyer will suggest councelling first,
before proceeding. That will be one last chance for both of
you.
You should be going through married life as a TOGETHER, and not
have divorce hanging over your head all the time, you owe yourself
that duty at the very least.