I would also like to add that by allowing her to continue to cake-eat, she is NOT weaning herself away from om. You are giving her time to wean herself away from YOU.
You are enabling her all the time in the world to string you along until she feels comfortable enough to leave you.
And yes, stop telling her how much she is hurting you. It comes off as very weak. Leave your "feelings" out of this right now.
Stop living in "fear" of losing her. She needs to start feeling some real discomfort over the fact that she will lose YOU if she doesn't stop her ridiculous, disrespectful behaviors.
Don't you see how she is disrespecting not just you, but the kids as well? She is damaging them very badly by treating their father, and them, like this.