This has to be one of the nastiest splits we've ever seen!

Bethenny Frankel's ex-husband Jason Hoppy was arrested last Friday in NYC after showing up to their daughter Bryn's school and threatening the SkinnyGirl mogul. He was charged with harassment in the first degree and stalking in the fourth degree, after failing to comply with a cease and desist letter issued last November.

"The complainant said Hoppy had sent numerous emails and FaceTime calls numbering in the hundreds after a cease and desist letter was sent on Nov. 22, 2016. On Friday, Jan. 27, [Hoppy] approached [Frankel] and a friend at her child’s school at around 8:15 a.m. and tried to provoke a fight. He said, ‘I will destroy you, you can get all the lawyers you want, you’ve been warned,'" an NYPD spokesperson told People.

Hoppy denies any wrongdoing.

"There are no words to express how saddened Mr. Hoppy is over his ex-wife’s unjustified actions. His only concern is his daughter and intends to vigorously fight these false charges," his lawyer Robert C. Gottlieb countered to People.

The pair split in December 2012 after three years of marriage, and finalized their contentious divorce in July 2016.

What a mess!