Source: Yolanda Foster's Role on 'RHOBH' Was 'the Beginning of the End' for Her Marriage

Did Yolanda Foster's growing fame destroy her marriage?

A source close to Yolanda tells Entertainment Tonight that the former model's desire to appear on Bravo's Real Housewives of Beverly Hills reality show caused a rift in her relationship with musician David Foster. The former couple tied the knot in November of 2011 and, just one year later, Yolanda made her RHOBH debut.

"The show definitely was the beginning of the end," the source tells ET. "David never wanted to do the show to begin with, but he saw how much Yolanda wanted to do it, so he agreed."

WATCH: Yolanda Foster Says Lyme Disease 'Changed the Dynamic' of Her Marriage to David Foster 

The source adds that Yolanda "wanted more fame and thought it would be a fun thing to do. David hardly was ever on the show and when he filmed, he didn't seem like he wanted to be there."

But the show wasn't the only factor in the split. As ET previously reported, David's commitment to work and Yolanda's battle with Lyme Disease also played contributing roles.

WATCH: Inside Yolanda and David Foster's Shocking Split: 'Distance and Her Illness' Drove Them Apart

"Sadly we have decided to go our separate ways," the pair told ET in a joint statement earlier this month. "We've shared nine beautiful and joyous years together. During that time we experienced love, friendship and the inevitable challenges that come with managing a marriage, careers, blended families and health issues."

Just two days after announcing their breakup, Yolanda hit the red carpet for the premiere of the new season of RHOBH. "I keep going, one foot in front of the other," she told ET. "Obviously, this is a difficult time and I'm heartbroken, but [I'm] grateful to have my job and be dressed and up out of the bed."

Yolanda's RHOBH co-star Lisa Vanderpumpalso weighed in on the news at the premiere, confessing to ET: "I think the dynamic can change in a relationship when the woman suddenly is thrust into the spotlight."

See more from the bittersweet event in the player below.

EXCLUSIVE: Yolanda Foster on Split From David Foster: 'I'm Heartbroken'

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