If the wife continues to use an IUD, the husband may be forced to live separately. A separation would be for his spiritual welfare. A wife who is anti-life, or pro-death, is to be shunned.
It's not permitted to divorce and remarry but separation is perfectly acceptable.
If this isn't feasible, then the husband should sleep in a separate bedroom and avoid his wife as much as possible.
I don't want to say that there are times when a man needs to cut his losses because these are issues a man has to work out to his own satisfaction befoer he even asks a lady to marry him.