It was the best of sleepovers, it was the worst of sleepovers, as “The Real Housewives of Orange County” continued its twin missions of mischief and madness in Temecula and Beverly Hills. The best of sleepovers is taking place in Beverly Hills, of course, because Heather Dubrow does not do anything if she can’t do it the best — or at least spend the most on. This week, we learn that Heather dropped $15,000 on her sleepover with Emily Simpson and Gretchen Rossi. As the Full Dubrow unfolds – matching custom beds, matching monogrammed PJs and sleep masks, enough candy...