Dude, you're misunderstanding me I'm not saying if the mother separated from the father, I'm talking in the context of them being together while she does this and obviously there's no problem for the mother to marry someone else while separated, but what will happen here is different, the guy doesn't want to date her, he just wants to corrupt her and humiliate the MC. we western have a diffrent concept of the NTR to us NTR is the maning of stealing somone that we have a romantic relathionship, but the concept of the term NTR is not only in sexual or romantic terms, but it involves a whole family environment and important friends, of course, as well as love interests the NTR, the western see the NTR as only when somone a rival or a enemy stole somone that the MC is in a love or in a romantic relathionship.