Her face is all the confirmation anyone needs. After months of wondering why Jack didn't tell anyone, she's unprepared for the truth to be aired so casually. She jerks back, eyes finding Will and immediately flitting away again.

Part of her had desperately wanted him to know.

(I won't be so easily caught this time, savvy?)

Now he does. Now everyone knows, and Elizabeth is surprised to feel relief mingling with the panic at being caught off guard.