In the three-part "RHOBH" Season 13 reunion, Kathy joined her sister, Richards, to discuss the split and the impact the relationship has had on their family.
Umansky "is going one way, she's going one way, and they're both trying to work," she said. "Kyle didn't decide this in three months. This, for sure, I bet she had been thinking and feeling probably the last three [or] four years."
During the episode, Kathy also acknowledged the rift that emerged between her and her sister when Umansky opened The Agency.
"That put Kyle and I in a kind of a funky — and you and [Mauricio] in a bad spot, I would think," Kathy said.
Umansky confirmed that opening his agency negatively impacted Richards' relationship with her sister, her brother-in-law, Rick, and their children in season two of 'Buying Beverly Hills."
"I am Rick's brother-in-law, but unfortunately, it got really sour because it really affected the family — Kyle more than anybody," he said. "You know, her family stopped speaking to her."