Also at this point of the story it wouldn't even be cheating if she hypothetically would take the job without telling him since they are not in relationship."It's a genre of adult manga or hentai. It should be defined as CHEATING/Unfaithful/Adultery.
It is too often INCORRECTLY defined as "cuckholding". However true readers of the genre know that cuckholding is just a sub-element and a fetish. A fetish where one likes to watch their significant other, having relations (usually sexual) with another person.
In NTR(netorare) however the the a bf/gf/wife/husband Do Not have to make a appearance in the story whatsoever. They often Do Not Ever find out about the betrayal. In some ntr the cheated on individual may in up in a situation where they are forced to watch there significant other cheat on them. To go slightly further. Some ntr is known as NETORI. This can also be defined as Cheating. Ecxept it's from the point of view of the individual stealing away the heart of someone already in a relationship. Once again the gf/bf/wife/husband never has to make a appearance in this type of story."