Yolanda Foster Hints at Marriage Troubles on 'RHOBH' Premiere, Co-Star Kyle Richards Talks Split

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The Real Housewives of Beverly Hills star Yolanda Foster and her husband, GRAMMY-winning musician and producer David Foster, announced on Tuesday that they were splitting after four years of marriage.

Hours after ET confirmed the split, the new season of Yolanda's Bravo reality series premiered, and it was clear that the two were already going through tough times when the episode was shot.

WATCH: Yolanda Foster and David Foster Split!

The 51-year-old reality star opened up on Tuesday night's RHOBH premiere about having to spend a significant amount of time apart from her husband.

"He's so busy, finishing his big Disney project, his foundation. You know David, he's the man, he needs to work, he has a career," Yolanda explained. " That's part of David Foster, he travels, he does charities all over the world, it's been like that since the day I met him. That shouldn't change just because I'm sick."

Yolanda was diagnosed with Lyme disease in 2012 and has been struggling with the symptoms of her illness ever since.

WATCH: Yolanda Foster's Emotional Battle With Lyme Disease: 'Many Nights I Wished to Die'

Recently, Yolanda and her 65-year-old husband sold their 12,000-square-foot beachfront mansion in Malibu, and the two celebrated the sale with a sweet photo of themselves kissing on their breathtaking back patio in front of a stunning sunset.

On Tuesday's episode, Yolanda admitted that she hadn't stayed in the couple's Malibu home in quite some time.

"I've been staying at the condo for the last nine months," Yolanda said. "It's convenient because it's in the city close to where all my doctors are. My house in Malibu is way too big. To be in a small environment within four walls is about all I can handle."

WATCH: Yolanda Foster Sells Malibu Mansion to Concentrate on Battling Lyme Disease

Following the premiere on Watch What Happens Live!, Yolanda's RHOBH co-star Kyle Richards addressed the couple's split, explaining that the break-up wasn't exactly shocking.

"We didn't know, but I think they've been struggling," the 46-year-old reality star shared. "Yolanda's been so sick, and I don't know if that has anything to do with it -- I have no idea -- but it's just really sad."

For more on the celebrity couple's big break-up, check out the video below.

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