She knew it all along

Nora Ephron (Sleepless in Seattle) complains nobody asked her who Deep Throat was. "Why these people with these ludicrous theories didn’t call me I cannot imagine. I am listed." Maybe because then they'd have to talk to Nora Ephron.

So Felt began to tell the people in his family the truth. "I’m the guy they used to call Deep Throat,” he allegedly said to them. My guess is that they reacted with incredulity; after all, that's how people have reacted to me over the years.

Ephron is divorced from Carl Bernstein, but claims she figured it out on her own.