Yeah, can't say I blame you for wanting to call her out on the BS. We can see from her response how much she liked that. I never liked it either. Just know that all this other stuff she's sending you is more of the same. She is trying to F.O.G. you into paying for her car! I just loved(not) the beach house guilt trip. Well excuse me, missy, your Moma earned the right to live there! She's worked/working hard, not getting high! She's not out spending every last dime on dope either! Sheesh! I know it's not easy but try real hard to disengage.
If it helps you to draft a letter back to her, then do it. Just don't push send.