'RHOBH' Lisa Rinna And Kim Richards Feud: Reality Star Accuses Harry Hamlin Of Cheating On His Wife

The Real Housewives of Beverly Hills hasn't even started yet and rumors are already making their way online about what the huge fight between Lisa Rinna and Kim Richards was about during the explosive trailer. Well, new rumors are claiming that Richards hit below the belt when she alleged that Rinna's husband has been cheating on her.

Lisa Rinna Makeup Free Selfie: See Picture

Radar Online is reporting that the fight went down at a party Adrienne Maloof hosted at a nightclub last month. When Kim brought up the rumors, all hell broke loose.

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"Kim had heard rumors for awhile that Lisa Rinna's husband, Harry [Hamlin] had been unfaithful," an insider explained. "Upon hearing the claim, Lisa went nuts and immediately lunged at Kim. There are certain things that are just off limits as far as Lisa is concerned, and Harry is on that list."

In the trailer for the new season, Lisa went off on Kim, throwing wine on her before smashing the glass on the table.

Lisa Rinna says in the clip, "Don't you ever f--king go after my husband," while Kim screams in the background, "Everyone will know."

The Inquistr is also reporting that the feud broke out between Rinna and Richards at Maloof's party and that the two actually had to be separated.

Kim Richards And Lisa Rinna Brawl At Hollywood Party

"Kim didn't think Lisa would have such a violent reaction, and it really shook her up," a source explained.

It seems Lisa is not happy with Kim at all and has actually vowed "to get revenge on Kim and expose even more lies when the cast reassembles to tape the reunion of the show in the next few months. Lisa is a real firecracker and Kim opened a can of worms she will regret opening."