RHOC stars Shannon Beador, 60, and Alexis Bellino, 47, clash big time during the season 18 episodes. It’s no wonder given that Alexis is dating Shannon’s ex, John Janssen, 61. But, as John and Alexis announce their engagement, Shannon seems pretty unphased as she “slays all day” with her gal pals. It’s no secret that Shannon Beador has been through a lot during her time on The Real Housewives of Orange County. When the mom of three joined the Bravo show, she was married to David Beador before the couple’s relationship broke down on screen some years later. Shannon’s ups and downs have been doc…