When you married your spouse, the idea was for better for worse, in sickness and in health, til death us do part and yet here you are, not dead and facing the prospect of divorce. The vows are for bet.
You are allowed to terminate your relationship with toxic family members. You are allowed to walk away from people who hurt you. You are allowed to be angry & selfish & unforgiving & don't owe anyone an explanation for taking care of you.