Musk met his first wife, Justine, when they were both enrolled at Queen's University in Ontario. As PayPal's success multiplied, they married in 2000. Tragically, their first son, Nevada, died from Sudden Infant Death Syndrome (SIDS) when he was just 10 weeks old.
The two eventually had children with the help of in vitro fertilization, which often produces multiple births. In the Musks' case, it happened not once, but twice — first they had twins in 2004, and then triplets in 2006, all boys.
Justine Musk, who published three novels during this time, wrote that her husband was manipulative and obsessed with his work. In a Marie-Claire article, she wrote, "'I am your wife,' I told him repeatedly, 'not your employee.' 'If you were my employee,' he said just as often, 'I would fire you.'"
Following a messy divorce in 2008, Musk began a relationship with English actress Talulah Riley, and in 2010, the two married. Just two years later, they divorced. In 2013, not only did they reconcile, but they got married once again. Perhaps not surprisingly, they divorced for the second time in 2016 [source: Cain].
Later that year, Musk started another high-profile relationship, this time with actress Amber Heard. That flame died in late 2017; the next year Musk started dating pop star Grimes.
Perhaps it's no real shock that during a 2017 interview with Rolling Stone magazine Musk said, "If I'm not in love, if I'm not with a long-term companion, I cannot be happy... I never want to be alone" [source: Strauss].