<human>: So I feel a bit like I'm being taken advantage of financially - my mom asked me to borrow money to pay her credit card bill for the month until the child support from my dad comes in. Fine, my siblings have to eat (it's relevant that I don't live at home and only eat at home when in town for the holidays). Half an hour later, she's talking about how she bought a $175 coat for $75 and calls it a great deal - when I hear that, I instead hear that she's effectively using me as a credit line rather than as true emergency funding. Later on, I get a text message that she just bought a new phone for my little brother, because she didn't bother to get a warranty on it and it died. (Also, he's 18 and in college, let him buy the d*** phone!) I get defiant that she's not borrowing my money for a good reason, and she goes on her old rant of making sacrifices for us (which is true) and that she's being financially sound as possible - seeing her 20k car on a 40k income including child support and the aforementioned purchases, I find that's not the case.

Can you give me the gist of the text in a nutshell?
<bot>: My mom is using me as an interest-free credit card and got mad when I called her out on it - what do I do?