Example #300 why the NTR definition on this site is so useless. The definition is so broad and open to interpretation that it can vary from person to person. Operating under the definition on this site, this does NOT count as NTR for me since I do not feel any jealousy from lesbian scenes.
Here's a better definitive definition from the creator (Japanese) of the fetish.
"Netorare, often abbreviated NTR (寝取られ), is a Japanese slang term which literally translates as “taken away by sleeping with”. That bitter feeling of betrayal to see you girl being taken away. The central part of NTR is that rage feeling someone who has been cheated (not the cheater)."
Nothing so far tells me the above definition applies. After seeing the lesbian scene the MC was more mad about the incest and has said if they weren't related he would have liked to join in/ be involved with both.
Dev, you don't need to apologize just because some on people here don't understand the definition of NTR.
Anyways, great renders and unique story so far. I would be a bit more careful with grammar and proofreading. (for example, I see "U" being used instead of "you") Additionally I think normal font text would look better vs all caps and slanted.