Kim and Kyle Richards reveal the reason behind their feud

The bitter feud between Kim and Kyle Richards came to a head during the third and final installation of "The Real Housewives of Beverly Hills" reunion Tuesday.

And the squabbling sisters finally revealed the real reason why they haven't spoken in months.

"What happened?" asked Andy Cohen on "The Real Housewives of Beverly Hills."

"Her dog bit my daughter,"

"Who, Kingsley?" asked Andy Cohen.

"Mhmm," said Kyle.

Kim and Kyle have been at each other's throats ever since Kim's dog Kingsley bit Kyle's 18-year-old daughter Alexia back in 2014.

Alexia spent five days in the hospital with a bone infection in her hand after the incident. But it wasn't the dog bite itself that had Kim and Kyle up in arms.

"She decided to Instagram it and make a public display of it. This is not part of a f------ show," said Kim.

"It's a huge part of the puzzle!" said Kyle.

"You're horrible! This is why I don't like her!" said Kim.

"Kim! My daughter almost lost her hand!" said Kyle.

Kim accused Kyle of throwing the incident in her face by posting photos of Alexia in the hospital on her Instagram page.

But Kyle insisted she was just trying to cheer her injured daughter up by having some fun and didn't publicly blame Kim's dog for the accident.

After about five solid minutes of screaming from both sisters, Kim told reunion host Andy Cohen she didn't want to talk about the incident anymore.

And they both ended the show by admitting they aren't hopeful that they'll be able to mend their relationship any time soon.

As a writer for Bustle rightfully noted, "This was another major blow-up between the Richards sisters ... and we've seen way too many of these this season. RHOBH drama is always entertaining, but this is just too real."

And a writer for Zap2it even dubbed the brawl "one of their ugliest fights to date."

Hopefully, Kim and Kyle can set their differences aside for the sake of their families. Though we're sure we'll see much more of their issues during the next season of "The Real Housewives of Beverly Hills."

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