I don't understand how people are comparing sharing a LI with another female as even remotely similar as to sharing with another male. Especially when said female is also sexually active with MC. It makes no sense to me at all.
Sure you can be against sharing a LI with another female but that is a singular objection and not at all related to sharing with another male.
I have read through the current update and don't see anything that would come close to NTR. Netorase (sp?) yes because the MC is cucking another male.
Mando Logica I wouldn't waste too much thought with some of these objections especially since your story is already established in your comic.
As a side note: a question to anyone here that is familiar with the comic. Is there any reason I shouldn't switch over to the comic and continue the story since it is farther along than the KN?