the shane doc was filmed at her house which im pretty sure is in southern cali, but the mom was definitely around (the tv was on and shane said something about it but the mom didnt want to be seen on camera for some reason) and seemed like she probably was there a lot. IIRC eugenia mentioned in that doc about how her mom and her are kind of back and forth between there and CT, her mom mostly while i think eugenia spends more time in cali than not, and the brother was at college in wyoming (edit: i read the university name wrong its actually in california so that throws a small wrench in my idea of the family dynamic as far as location). im assuming the dad is in CT most of the time but i could be wrong. i bet a lot of these details are hinted at across her thousands of hours of streams and whatever but i could never be assed to sit through that shit. most of what i know is just from mild observation and other youtubers.
edit just for more observations....
the dad was was stock broker or something along those lines, and theyre from greenwich CT (stepford wives town) which is mostly old money but pretty much all very rich. my first impression was that the family was living off of eugenia, but now i think the family was already probably very rich (eugenia's childhood home is apparently worth 1.3 mil and the parents networth is recorded as around 3.5 mil). that just adds more credibility to the munchy abusive shit. i also wouldn't be surprised if sexual abuse was in play at some point, whether from the parents or someone else.