Wow, IR, alot happened here while I was reading a book. I have to agree with OT and NB. While your reply might give you some short term satisfaction, it's just giving her the payoff she wanted in the first place. Don't give her the pleasure. She wanted you to respond like that. Don't do it. Either no response at all or just business, no emotions.
And btw, you should be keeping a record of every penny you're giving her and why. It should go in the record so she can't come back and say you didn't do something you should have.