Shannon Beador reveals she has a “two drink limit” these days after dealing with a traumatic DUI situation last year. The “chaotic” opening scenes of The Real Housewives of Orange County season 18 see Shannon explaining her current stance on alcohol to co-star Emily Simpson. While Vicki Gunvalson was the true ‘OG of the OC’, two of the former ‘Tres Amigas’ are back on The Real Housewives of Orange County this July. Tamra Judge and Shannon Storms Beador have been long-running cast members on the Bravo show. Shannon joined the reality TV show 10 years ago. Her life looked different back then, as…