Thanks for the preview. I don't consider Kendra an antagonistic character. I wish her and MC's mom all the best. I see her as a father figure for the two sisters...with a twist of debauchery. Every update should have two hardcore scenes: one with Kendra and 2nd with MC.
Based on what we can see of her so far, Kendra's likely to be the biggest source of NTR content for the main character, so while she's not going to be antagonistic in a supervillain way, later interactions with her will probably be quite tension-filled.
I don't get the feeling that she'd potentially bad-end the main character, though I could be wrong (and who knows how long it'll take to find out...).
Of course, regardless of how the main character feels, whether the
player likes or dislikes Kendra is entirely up to how much they enjoy the NTR kink.
Regarding future interactions with her, I'm sure people should be able to avoid the hardest content by keeping the NTR score low if they dislike it. However, I wonder if it's going to be a slowly-ramping inevitability, such that the NTR stat eventually only determines whether you get softer or harder NTR content.
I mean, a game that has an NTR stat
at all sets a pretty clear expectation for the tone, and even the initial encounter in the prison would make people feel uncomfortable if they weren't already slightly into the kink.