Keiarna Stewart chats with ET’s Brice Sander at the season 10 premiere of ‘Real Housewives of Potomac,’ airing Oct. 5 on Bravo. The reality star reacts to speculation that she and boyfriend Gregg Diggs are split up and Greg himself crashes the interview. Plus, Keiarna opens up about the season 10 drama and where she stands with certain co-stars.