That’s why she would have a dead man’s switch. If anything bad happens, everything comes out. That way, nobody with any motive to get rid of her can do anything about it except keep her comfortable forever

Switches can be "tampered" with! Her father didn't have one? Epstein himself?

Who could her father blackmail at the end? His entire empire was at the brink of collapsing, so either he jumped off his boat, fell off, or was pushed, whereas Epstein had already once got a cushy day release program. But Ghislaine? She had the ability to plan before she got arrested.