Kyle Richards set a hard boundary when discussing her fractured relationship with Mauricio Umansky Wednesday night.

During the third part of “The Real Housewives of Beverly Hills” Season 13 reunion, the reality star refused to reveal why she and Umansky called it quits on their marriage.

“It’s nobody’s f–king business,” she asserted after host Andy Cohen asked a fan-submitted question about why the star has not come clean about the reason for their breakup.

At another point during the reunion, though, Richards, 55, touched on her previous statement during the Season 13 finale that alluded to the reason for their separation. In the finale, she said “there were things that happened that made [her] lose [her] trust” in her husband.

“With any marriage there’s issues that you have, and they come up, and then something like I said in my interview happened where I did lose my trust,” she tearfully explained during Wednesday’s episode.

“I care about my family first, and I really did try, and then when I couldn’t, the kind of things that I was, I don’t want to say putting up with, just became more apparent to me, I guess I couldn’t do that anymore and I finally just had a breaking point.”

Page Six confirmed the Bravolebrity and Umansky split in July 2023. In October, the Agency founder said there was still hope for their union by telling Page Six they were “not throwing in the towel.”

However, the hope of piecing back together their crumbled relationship seems to vanish as time passes. Umansky even sat down with their daughters to discuss their separation in a preview clip for Season 2 of Netflix’s “Buying Beverly Hills.”

“I had an amazing 26 years with your mom –– an amazing 26 years. I wanted to do everything possible to just save it,” he said to their emotional daughters.

He also confirmed they were free to explore relationships with other people.

Umansky and Richards share three daughters: Alexia, 27, Sophia, 24, and Portia, 16. Richards is also mother to 35-year-old daughter Farrah, whom she welcomed with her first husband, Guraish Aldjufrie.

Furthermore, while they are still residing under the same roof as they navigate their split, they don’t plan on living together much longer.

An eyewitness told Page Six Tuesday that Umansky was recently heard saying he and Richards are “not together” and he is “moving out” of their home.

Plus, Richards’ sister Kathy Hilton speculated that she had been debating leaving Umansky for the last three to four years on last week’s reunion episode.

Richards has been romantically linked to country singer Morgan Wade since last summer, but she has vehemently denied that they are more than friends.

While Umansky has been spotted out on dates and partying with younger women, he is not thought to be in a serious relationship.