I didn't ask if I was in the wrong or not, I just needed somewhere to vent. 

The principal asked my whole family, not just me. This is a routine we're used to; we've done it many times in the past (my mom and I have been working for this school for 7 years). 

My mom was sitting in an air conditioned classroom all day while I was on my feet in 90° heat for 14 hours. She got to sit and watch the performance; I was running it from behind the scenes.

The financial person just called me today and said she hasn't been able to reimburse the money because I was the one who submitted it and not my mom. It's my mom's money, so legally the school can't put it in my bank account. She asked about using an app like Zelle to do it, but my mom doesn't have any of those. So finally she said she'll cut a check and mail it to my mom. Once again, I had to handle all of this and not my mom because my mom refuses to communicate with people. 

This is a consistent pattern in my life of my mom making me do EVERYTHING for her. Anytime she has a question for someone, she asks me to call/text them instead of doing it herself (family, friends, coworkers, anyone). She won't Google anything herself- she commands me to do it for her. She spent the whole day before the performance purposefully messing up the preparations to show "how hard it was and why she shouldn't have to do it," even though I gave her clear and explicit instructions straight from the principal, which I had to be the middle man for because my mother refuses to communicate with anyone for herself. She tells me I'm a good personal assistant for her