No woman should stay married to a man who beats her and/or beats their children. That would be stupid and life-threatening.And I presume a woman should endure the hardship of having an abusive husband?
"Can endure" is different than "must endure". If she doresn't wish to "endure" suffering and has alternatives, she doesn't have to.
But if what you mean by 'abusive' is defines as a man who doesn't always agree with his wife and agruments happen because of this, then I would say that a woman should stay married and learn to compromise with her husband. You can't always get what you want.