Jesus, this is not NTR. This is an open relationship. This is actually FAR more common than traditional cuck relationship on here where the guy just passively watches his girl be a stut. She fucks whomever she wants whenever she wants and he does the same. The only weird part about this is the Henry situation where she asks her boyfriend whom she hasn't seen in a while and just got home on an airplane if she can go spend time with Henry rather than him. Dev should remove the part where she asks to go home with Henry, she should want to be with the boyfriend after he's been gone. Henry SHOULD ask her if she wants to come over, but then she should say no, she wants to spend time with her boyfriend because he just got home, THEN MC should be given the option to invite him over or spend the afternoon for some special alone time with his girl. That feels like the way a real open relationship would go. Other than that one interaction this feels like a normal IRL open relationship.