[should he geass her? make her forget what she saw? but it's a mistake to assume that the geass will work on nonhumans, especially when he doesn't really know or understand what that entails; Kaname is certainly no one he'd ever underestimate, and actually seemed to sense the contract once, when they were -- close. his gaze flickers away, but he still sounds calm, almost apologetic when he tells her]
I'm sure you're horrified by what you've seen. And I realize this must seem like the height of selfishness, coming from me, but I must ask you to please not tell anyone about it.