I seriously can't even begin to comprehend the problem with being an orphan Toxic Mom has. I've certainly been exposed to plenty of different bigotries and stereotypes and biases but "don't let your daughter date an orphan"? Literally never, what on earth even is this.
I think it's less cause she's an orphan, and more because she is a prostitute.
And well, if we break this down, Makino's family is clearly a rich one, and given the arranged marriage interviews, also carries influence, so it coming being gay would be problem for clearly conservative parents, and her partner being a prostitute would make them think of how much bigger of a scandal that could cause with all the other rich families.
Though given the family is rich from prep schools, they really shouldn't worry about other rich families opinion on them. Since I doubt their customers give a shit who the school owner's children date, since kids that are enrolled care about actually helping them improve to get into college, not what goes on with the family drama of the school's owner.
Really clear to me Toxic mum needs to seriously rethink her life. Cause her family's love life reputation doesn't matter, their management skills do, since that'd show their actual customers, those being parents of students studying for exams and the students themselves, they know what they are doing.