All last week (and this weekend) the entertainment shows were promoting a &amp;#8220;big reveal&amp;#8221; coming Monday from Oprah. The TV mogul&amp;#8217;s people promised a big surprise family reunion and, as is the case with anything Oprah does, people paid attention. Did she have a long-lost child? Or maybe a sibling? Yes, a sibling. That&amp;#8217;s it. [...]