Has the mystery of #WhatDidHarryDo finally be solved?

Brandi Glanville Reacts To Lisa Rinna's 'RHOBH' Season Six Comments

During season five of The Real Housewives of Beverly Hills, the hashtag became well-known due to Kim Richards' never confirmed allegations against Lisa Rinna's husband, Harry Hamlin. And now, with season six is set to premiere in just weeks, a source claims rumors are swirling regarding Hamlin's alleged cheating.

“This season, several cast members started a campaign once filming began stating there had been whispers Harry had cheated on Lisa," a source told Radar Online on Friday. "This was entirely separate from what Kim Richards had been referencing during the last season.”

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“Lisa was furious this was continuing into another season and insisted it wasn’t true,” the source said. “Harry isn’t happy that he is going to be dragged through the mud yet again. Being on the show has definitely impacted their relationship.”

As Rinna revealed to Entertainment Tonight months ago, Hamlin was initially against the idea of Rinna joining a reality show, but after realizing it could be a good thing for her career, he encouraged her to take part in The Real Housewives of Beverly Hills season five.

“Lisa and Harry’s marriage is on solid ground, but how much more can this relationship take?” the source added.

The Real Housewives of Beverly Hills season six premieres on Dec. 1 at 9 p.m. on Bravo. Check out the series trailer below.