Do the raws use the word wife distinctly as opposed to fiancé or was that a typesetting choice?
Truthfully I only mentioned it in the first place as the glasses guy seemingly was fixated at taking someone else's wife for themselves, in which the wording feels very out of place tbh. Although I feel it's somewhat okay for the FL to use the terms interchangeably other students referring them as such is weird as teenagers wouldn't really refer to others classmates as husband and wife ever in a non-joking way (unless they for some reason were) since it's not a thing that would normally apply to people.