I agree that you reconcile yourself with God (“IN HEAVEN”) when you forgive someone, because how can one enter heaven with unforgiveness in their heart?
In a transcendent spiritual sense; and yes, one would never be lead to despair in God’s household.
Are you suggesting that a spouse must “bewilling to die for that person” at the hands of an abusive (physicallly, emotionally abusive), unrepentant spouse? Not always advisable for survival sake.
It is only acceptable to die to save the life of another.
If you leave your husband or wife to protect your childern then that is also justified.
If you leave your husband to protect your self from harm then that is also justified. There would be no life that could be saved.
If he becomes a violent killer then the fact is you have a husband that is a violent killer. Only your love can have any hope of changing his heart. Do you have to live with him. No you don’t.
But should you forget about him NO!
The problem occurs when you divorce your husband and forget about him. When you go off and find another man you are the one that is now a sinner.
With all that said, most women are never subject to the violence as you describe. Most women and men today leave their spouce for unjustified reasons.
Think about what christ told us.
“when I was poor did you feed me?”
now consider the fact that there are other forms of poverty.
“when I cheated on you did you still love me?”
"when I was addicted to porn did you stay with me?
“when I was a child did you protect me from my abusive mother?”
"when I hit my child did you get help from me?
“when I was an alcoholic, did you keep it away from me?”
“when I left you and our childern for another women, did you forgive me?”
Poverty is a result of sin.