From what I've gathered and played, I agree with Dev that NTR tag is not necessary in regards to Lucie. Odd character personality change aside, that dream sequence alone, while contentious, isn't NTR tag worthy.
Zoe on the other hand, yes, I would disagree, and argue, her circumstances absolutely necessitates an NTR tag.
Otherwise I suppose dev could rewrite her entire character to show she thinks MC is unattractive, only views him as a friend, and makes it clear from day 1 she wasn't ever interested in us? Hard for the reader to like her as a character at that point, but at least you'd justifiably avoid the NTR tag lol.