Kyle Richards is open to dating a woman. The 54-year-old star separated from husband Mauricio Umansky – the father of her daughters Alexia, 27, Sophia, 23, and 15-year-old Portia – in July after almost three decades of marriage and gender isn’t a factor in considering who her next partner will be. In a preview for an upcoming episode of ‘The Real Housewives of Beverly Hills’, Kyle asked her co-stars if they would consider “dating a woman” during lunch. Dorit Kemsley almost spat out her wine at the question, but Crystal Kung Minkoff turned the question back on her friend, who simply nodded and …