‘Real Housewives Of Beverly Hills’ Star Kyle Richards Feuding With Sister Kathy Hilton Over Husbands’ Competing Real-Estate Companies

Kyle Richards Kathy Hilton feud — Kathy Hilton and her sister Kyle Richards are rumored to be feuding and are not speaking to each other. Pictured: Hilton and Richards at the Los Angeles book release of Andy Cohen's "Most Talkative: Stories From The Front Lines Of Pop Culture," May 14, 2012. Getty Images

The drama between reality star Kyle Richards and her family is still going strong. The 46-year-old "Real Housewives of Beverly Hills" star is finally mending her relationship with sister/former co-star Kim Richards, but now she's rumored to be feuding with older half-sister Kathy Hilton.

People magazine reported the drama between Kyle and Kathy seems to stem from beef between their husbands. A source told the outlet Rick Hilton still hasn't forgiven Kyle's spouse Mauricio Umansky for leaving Hilton & Hyland real-estate company and starting his own successful real-estate business, the Agency.

"The animosity has been building up for a while. Mauricio isn’t even welcome in the Hilton house," the source said.

Supposedly, the drama between the sisters doesn’t end there either. People reported Kathy is also upset with Kyle for bringing her daughter Nicky Hilton into their feud.

On Season 6 episode 2, Kyle told the ladies her niece Nicky had invited, then uninvited, then invited her again to her wedding. At the time, Kyle refused to say why her invitation kept getting taken away.

"Kyle and Kim are still working on their issues, and now Kathy and Kyle aren't speaking," the source said. "There is so much drama in the family. It's sad that even over the holidays, they still can't get along."

According to People's insider, Kyle and her husband never received invitations to Kathy and Rick's annual Christmas holiday party last weekend.

As previously reported, Kyle recently opened up about sister Kim, saying their relationship was a "work in progress." The two fell out during Season 5 of the Bravo show mainly due to Kim's struggle with alcohol.

“We have a very difficult relationship and we will probably always be a work in progress,” she confessed to show creator Andy Cohen on his “Andy Cohen Live” SiriusXM radio show.

Their "Real Housewives of Beverly Hills" co-star Lisa Vanderpump also dished on Kim and Kyle's progress telling Us Weekly in October the two sisters had put their issues behind them and had made a "step in the right direction."