Facetimed me w D4. Sent me a handful of emojis from D4. Talked about what I can do for christmas with D4. She has sent me 8 messages since I responded.
All of these actions describe a woman who wants to control. She wants to be included when you Facetime D4, and even tell you what to do for Christmas with D4.
As you've previously stated, you are in such a habit of responding to every little thing she sends via phone......it will take considerable effort to train yourself not to react. You can do it. Start by not giving any type of response to her texts that don't ask a direct question regarding D4, or one you deem important. Then if you need to respond, use as few words as possible. No conversations, no overkill on politeness.
She's going to be a real challenge, but you can do it. Give yourself a pep talk three times a day.....or more.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!