It's important to note that to an American, they're middle class almost completely irrespective of their circumstances. Single parent living in subsidized housing, working for near minimum wage? Middle class. Lower middle class, maybe, if we're not feeling defensive. McMansion, dual income family with one doctor and one lawyer? Driving expensive European cars (one for each adult, plus one for the teenager), vacationing abroad yearly, middle class, maybe, maybe, upper middle class if they're feeling embarrassed about their wealth.
Your family owns the only plumbing company in town and you have several houses a small fleet of vehicles and dozens of employees. Your surname is a local household name. The highschool gym is named after your grandpa. Sure you're prosperous but upper class? Idk, I mean listen you have to go to work, sometimes, at the sinecure your dad got you at said plumbing company. Real rich people don't have to pretend to work, right?
Everyone pretends to be middle class.