Gregor's perfectly aware that even asking that much instantly explains the bulk of it, but he's not a coward, and he does actually listen to Cordelia most of the time. It would benefit him to talk about this with the party most involved, rather than just keeping it bottled up, and now that Duv's taken on the onus of initiating the conversation rather than Gregor having to find his courage, it's as good an opportunity as he'll ever get.

He nods, listening to his, pulling their joined hands into his lap like something he wants to keep. Duv's provided him a neat lead in, mercifully. "It's what was taught to me. Carefully, I'm sure. And I don't... blame anyone," his voice lowers, "for not wanting to tell someone their father was a rapist and a sadistic torturer. I'm sure it seemed irrelevant with him dead. But I found out... poorly. And at a bad time."

He stops, in what would ordinarily be some expansion of that statement, something about how it had affected him. But Gregor just stops there, words stuck. Immobile. He's never spoken of this in so many words before; Cordelia hadn't needed two words to realize and understand what had happened. Just I overheard someone speaking about my father and she'd known all the rest with her laser-precision acumen. Gregor had never before appreciated how kind that could be.