Nope NTR is a word, a genre... jealousy is an emotion.All the tags are defined in the Tags Rules And List thread and you can find the definition for each one of them there. NTR is defined as:
So yes, NTR has always been about an emotion.Ntr [Designed to cause jealousy by having the romantic interest involved with someone other than the MC.]
With that said though, this game does not have NTR since she wasn't a romantic interest. She was just your neighbor that you just met in a micro-scene where she insulted you. And even if it was NTR it's easily avoidable and preventable.