ED Asking for Money again, dilemmas, not sure how to repsond

No is a complete sentence. You don't owe her anything, including an explanation.

Spinnaker

I'd just say no, no explanation, nothing.

This

I’m with Spinaker on this , just ignore her . Do not acknowledge her requests.

I'd just say no, no explanation, nothing.

If you are estranged I wouldn’t keep giving her money, apologising is one thing but simply giving her money without there being any kind of a meaningful relationship is a no no in imho.
She is obviously playing on any feelings of guilt you have had towards her to keep giving her money.
You don’t see her so don’t do it. If she keeps texting ask her to come and see you and then you can both talk about her situation.
Wishing you all the best with this.

I’d just say I can’t afford it and leave it at that.
Very upsetting for you.

If you keep on funding her she will keep on asking. Don't become her to go to place for funding, say , that it isn't possible any more, do not apologise or at least try not too. Also don't give any reason, the fact that she has kept on asking doesn't mean that she wants to get your relationship back just that she sees you as a easy touch.