...Well, I'd feel bad for the husband, but the only thing we know about him is that she feels somewhat neglected by him.
Makes me wonder why she even married her husband in the first place, considering she wasted no time in seducing him after seeing his camera.
Also it's normally just cheating of its a one time thing. Most NTR involves many times and is meant to have an emotional impact on one or both of the parties involved in the NTR.
there are differences between cheating, NTR and Netori tags.
*Cheating is mostly like this work, a wife or a husband is cheating on their partner (the partner don't knows and is mostly not even seen in the story)
*Netori is where the protagonist of the story steals the wife/girlfriend/loved one or husband/boyfriend/also loved one from someone else. you read the story from the point of the 'thief'.
*Netorare is the opposite of netori, you see the story from the point of view of the partner that is being cheated on or in the most commun case lately you see from the eyes of the wife/girlfriend that don't want to cheat but is forced to for some reason and falls in love with sex with the netori guy.