The seemingly never-ending feud between Rob Kardashian and Blac Chyna reached new heights recently when the model claimed her ex-fiancé beat her up. Now, the reclusive reality star is firing back at her accusations, claiming she was, actually, the aggressor in the situation. He also revealed the alleged reason behind their explosive fights, and it's pretty serious.

According to TMZ, Chyna threw the first stone by filing a lawsuit against the entire Kardashian/Jenner clan, claiming they secretly conspired to sabotage her reality show. She also added that they made it their mission to "cause her great pain" over a reported domestic violence occurrence back in April where she claimed Rob knocked her to the ground and hit her.

In an attempt to refute her claims, Kardashian sources said the day prior to the alleged incident, the model was using cocaine and drinking alcohol all throughout the day — from morning to night. They added that Rob and Chyna were just fine later that night and even went to a strip club, where the former exotic dancer got a stripper to come home with them.

Once they got home with their new guest, the source claimed Rob watched Dream and Chyna's son, King Cairo, while she partied and did more coke with the stripper.

The site reports that the next morning, Rob decided to confront Chyna on the incident, kicking the stripper out and calling his then fiancée irresponsible. Rob claims she then went into a rage, hitting him, insulting him, and throwing objects in his direction. He stressed that he never hit her and only practiced self-defense.

The source added that while Rob had an appointment that same day with the Los Angeles County Dept. of Children and Family Services, where he had an open case against Chyna, he failed to mention the incident just to protect her.

The Kardashians' attorney, Shawn Holley, spoke to TMZ on the incident, saying, "We have witness statements and other evidence which will demonstrate conclusively that it is Chyna — not Rob — who is the violent and aggressive abuser."

Chyna's attorney, Lisa Bloom, failed to comment on the allegations made against her client, but did say, "There's no excuse for domestic violence."

Get more Rob and Chyna news with BET Breaks, above.