I'd be seeing red too. It's especially upsetting given how much you've had to go into debt to pay her and how hard you've had to work to cut down on your hours just to stay within a reasonable budget for your family. I'd want to feel that T was trying really hard to look out for me and it would sting to find out that others had access to her for much cheaper.

I've also had some intense reactions to professional choices my T has made. Most recently it's been about her cutting back her hours. As with your situation, her decision has nothing to do with me and doesn't really change our current arrangement in that I'll be seeing her for the same price at the same frequency. But it's upsetting to me nevertheless.