Mary Cosby and Lisa Barlow apparently had a “crazy fight” while filming RHOSLC. Multiple sources claim Mary called Lisa’s 12-year-old son an ableist slur, which left the entire cast “grossed out.” The Real Housewives of Salt Lake City cast gathered for filming, but it all kicked off when a huge fight broke out. Mary Cosby and Lisa Barlow are said to have seriously butted heads amid the Bravo drama. Mary Cosby and Lisa Barlow’s ‘fight’Mary Cosby reportedly called Lisa Barlow’s 12-year-old son, Henry, nicknamed Baby Gorgeous, the ableist slur ‘r****d’ during a “crazy fight” during RHOSLC filming…