It turns out Oprah has a half-sista from another mista! Oprah revealed on her show Monday morning that she has a half sister, named Patricia, whom she did not even know existed until last October. "I thought I'd seen it all," Oprah told her audience. "But this, my friends, is the miracle of all miracles." Patricia, who resides in Milwaukee, Wisc., had been searching for the identity of her mother who gave her up for adoption. She discovered the talk show queen was her half sister in 2007. Upon Oprah's discovery that "literally shook" her to her core, she immediately made plans to meet with Patricia. Oprah, who finally met Patricia last Thanksgiving, said she was living with her father, Vernon, when her mother gave birth to Patricia.