I think it's generally enough to know you've had a struggle, you've messed up, and you're working on yourself.
My wife also needed to be reassured that I wasn't doomed to become a serious danger to her, to our children, and to society in general. But we didn't have that discussion until we had traveled a considerable distance down the road of recovery.
If someone, however, is carrying a deadly venarial disease, it is something they shouldn't hide from their wife. I'm no expert, but something like that would probably be serious, and justified, grounds for divorce.
--Elyah