They really are stuck in some kind of student twilight zone and seem incapable of functioning as normal adults.
She seems to be close to her family but even they must roll their eyes at this BS.
I can’t quite decide if it’s perfomative or more a case of uselessness, but either way what she thinks is quirky and thrifty making mac & cheese (or rather MACARONI CHEESE) in actual fact is just lazy and tight.
Yes the poor kids, give them a proper roast dinner - or if that’s not your thing then steak & chips or something special - not a bloody dish that is a quick back up tea for busy week days.