It's not supporting her to let her have the OM. She wants a man that is stronge enough and secure enough to stand up to her. She sees you as weak and insecure and she doesn't feel the security she needs.
Have you really set an boundary that you won't share her with another man???????
Are you really doing whatever it takes?
You are wallowing in limboland and there is only one way out. You must lead your family.
M22,H45,W45 S21/18D12 Retain faith that you will prevail in the end, regardless of the difficulties and at the same time confront the most brutal facts of your current reality, whatever they might be.