Kyle Richards is giving her reaction to costar Yolanda Foster's split from record producer husband David Foster.
"Very sad. In some ways, yes [it was a surprise]. I mean, we didn't know," Richards, 46, told Andy Cohen on Watch What Happens Live Tuesday.
On the same day as the Fosters' divorce announcement, the sixth season of Real Housewives of Beverly Hills premiered showing signs of strain in Yolanda's marriage.
"But I think that they've been struggling, and Yolanda's been so sick – I don't know if that has anything to do with it, I have no idea, but it was just really sad."
Richards explained she has reached out to Yolanda after hearing about the divorce news saying, "I do feel very bad. She's struggling right now. To have go through that at the same time as dealing with the Lyme disease, it's going to be hard."
The late night host and Bravo executive expressed his shock calling the Fosters' romance "such a love story" but the RHOBH star – who has been divorced before – reacted with empathy.
"I'm sure they were [very much in love], and maybe they are. It's just, you know, life and marriage can be difficult at times, and she's faced a lot of challenges this year."
After nine years together (married for four), the Fosters called it quits telling PEOPLE: "Sadly we have decided to go our separate ways. During that time we experienced love, friendship and the inevitable challenges that come with managing a marriage, careers, blended families and health issues."
Since being diagnosed with Lyme disease in 2012, Yolanda has often shared her journey to recovery on her social media pages.
"[She] is just struggling to survive these days, honestly," Richards recently shared on her friend's health condition.