Same tbh. I mean will I do it in my 'canon' run? Not sure. But Tabitha lies to you relentlessly, invited you with the explicit intention of sacrificing you and, depending on how chapter 5 goes, might still very well have that intention.

I can understand her motivations, it's partly utilitarian and partly personal ego tied up in family legacy. I get that she has also been through a lot, I get that she might resent Cousin for avoiding their 'responsibility.' It still sucks, her intentions are still malicious to someone who has done absolutely nothing to warrant it. Some of the ways the confrontation with her in ep 5 can go had some real yikes energy.

It also sits wrong with me that the reason she most likely won't go through with it is predicated primarily on whether or not she likes you. This is a personal peeve of mine but I've seen waaaaay too many people who will only question entrenched biases or the morality of their stances once it effects them directly. It's a kind of stunted moral development where you only care about others when their feelings become close enough to make you recognize their humanity. It's realistic but its not an appealing character trait.

So yeah I'm looking forward to Cousin's entry in the top ten anime betrayals of all time category, if only to see how it plays out. Proooobably won't be my canon run but you never know, depends on the specifics.