Inside billionaire Warren Buffett's unconventional marriage, which included an open arrangement and 3-way Christmas cards

Scott Olson / Getty Images • Warren Buffett married Susan Thompson in 1952. • She ultimately left Warren to pursue a singing career, but they remained amicably married until her death in 2004. • Susan also introduced her husband to Astrid Menks, who became his companion. Buffett and Menks married in 2006. For much of his life, investment guru Warren Buffett has had a less-than-conventional marriage. While he remained married to his first wife, Susan, from 1952 till her death in 2004, he li...