"I guess? Kind of..." Kay chews her lip thoughtfully, awkwardly directing her gaze elsewhere for a moment. "It's not that I don't want him to know, I just... I haven't had a reason to bring it up yet, and I don't want him to think I don't trust him, or that I've been keeping secrets from him for some reason."

In many ways, it'd be a lot harder and a lot more emotionally taxing to explain the whole situation to Phoenix. Unlike Estinien, he has stake in the well-being of multiple other players in the case. She's only able to talk about it here because there's little threat of him delving for specific details. Phoenix is from much further along in their timeline than she is, so he knows AND has told her certain things of concern do turn out OK... But that doesn't make it any easier for her to talk about them in such details.