Kyle Richards gave Mauricio Umansky a set of “rules” to stick by after they split up. The 55-year-old reality star split from the 53-year-old businessman – with whom she has daughters Alexia, 27, Sophia, 23, and 15-year-old Portia – last summer after almost three decades of marriage and now he has explained to his daughters that even though he tried to do “everything possible” to save their marriage, Kyle needed “space” and allowed him to date other people but on the condition that they didn’t speak about it. Speaking in an upcoming clip from the season two premiere of ‘Buying Beverly Hills’, …