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Jill Duggar is learning a lot from “black sheep” cousin Amy.

In her book, the Duggar cousin described how she found out that her grandfather was a predator like Josh.

Amy also described her “true monster” grandfather inflicting horrific violence — particularly upon her mother, Deanna.

As it turns out, much of this eye-opening family information is news to Jill.

Jill Duggar learned so much from cousin Amy’s book

Taking to Instagram Live, Jill Duggar Dillard and Amy Duggar King promoted the latter’s book, Holy Disruptor: Shattering the Shiny Facade by Getting Louder with the Truth .

Obviously, Amy’s reaction to Josh’s heinous crimes is a key point of the memoir.

But that is only one dark piece of the family history.

Unlike Josh’s true nature,

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