yeah thats not correct, NTR or netorare is a Japanese word that directly translates to "to be stolen" (you have that part right) or "to be cheated on" and it elusively refers to a scenario where a character's partner is 'stolen' by another person, usually sexually or in other more PG cases romantically a person you are not romantically or even sexually involved with fucking other people is not NTR neither is Mothers/childhood friends getting stolen because there is no sexual or romantic feelings shared by the 2 characters. but you are correct I completely forgot about her being seen leaving a hotel room with another guy, my bad in that case it is in fact NTR.