This is a life altering issue you are facing. It is only naturally to be challenged in your decision making process. I believe you already know the answer. Often we hang on, hoping for a miracle, or another sign, possibly additional justification, anything to avoid the reality , of our happily ever after has ceased to exist.
You need to raise your kids in an enviroment that is healthy. If that means moving in with the parents, then move in with the parents.
Sending you strength...................... All my best to you