It would not be a bad thing to worry for her well-being. But at the very least, I think she is safe. I cannot be certain, since there are no certainties here, but I don't believe Ezio would kill again.

[ But, yes, that aside, because they might return to that topic— Hannibal nods, and his idea is quite simple. ]

Only a note. Leave it for Ezio to find, and his psyche is likely to handle the rest. It only needs to be two words—"They know."