Only NTR that I think is lacking in games is where character actually redeemed themselves by just admitting not worth it or fighting back or whatever most commonly they just become cocks for whatever reason. Well that and the hardcore NTR however that is overly depressive so not sure who actually enjoy those.I would like the ntr to enter the game in the same way, but it is a big no
When it comes to animal sex being NTR there are ways around that. There could be sex with just with people that have no relationship with MC which would technically be voyeurism e. g. Visiting another farm and witnessing the event. Then again wouldn't be surprised if there were people that insta shouted that it's NTR these days since everything where another character doesn't have sex with MC appears to be NTR or some insert meme joke