Robin L Marshall/FilmMagic The Real Housewives of Beverly Hills’ Kathy Hilton is giving an update on where she stands with her estranged brother-in-law, Mauricio Umansky. “I still care about him. He’s my nieces’ father. He’s been wonderful with Farrah,” Kathy, 65, said on the Tuesday, March 4, RHOBH After Show. (Mauricio, 54, and estranged wife…