1- What the husband is doing is sinful and Allah will hold him accountable for that.
2- As for the wife, if she doesn’t want to remain patient then next time she should not have him take an oath on the Qur’an and then she can take action about it.
3- If she keeps being patient Allah will compensate her. She should try to guide her husband using an effective approach, but at the end of the day he is responsible for his actions.