She really is the K clan's worst nightmare!

Rob Kardashian and Kylie Jenner filed a lawsuit against Blac Chyna for battery, assault, and vandalism at the end of September, and now the former stripper has a plan to make sure they never end up in court, by threatening to spill all the Kardashian family secrets. We find it hard to believe she didn't sign a nondisclosure agreement when she started dating Kimmy K's little bro, but maybe she found some loopholes.

“She is planning to reveal everything she knows about the Kardashians. Kris Jenner and Kim Kardashian are terrified," a source dished to In Touch.

BC also has knowledge of her former boyfriend's drug use, which she plans to use against him if this beef isn't squashed.

"She has told the Kardashian camp she wants at least seven figures to make all of this go away, which they could easily pay just to be rid of her,” the source added.

We don't know how this doesn't amount to extortion!