Background info: my dad was raised by a single-mother so extremely blue pill in every sense of description. Makes a lot of money, but right now we can't even breathe anymore due to my mom's ridiculous, lavish spendings.

We don't have money, I'm barely affording college (in working 2 part time jobs), my dad is on the verge of losing his business, all because my mom won't stop buying expensive designer clothes, watches, cars ($10k + a pop). My dad is too weak of a man to say anything and I have called him out on it, he just tells me that I don't understand a complicated scenario. She has also cheated before, thus polarizing the emotional connections of me and my brother. I'm getting pissed as I write this because I'm going deeper and deeper into debt due to my mom's hedonism. In what way can I get her to stops? (Cutting off contact is not a good idea, too many family connections on my mom's dad's end)