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- Elon Musk's biographer says the most painful thing in the billionaire's life was his relationship with Amber Heard.
- Walter Isaacson said on Kara Swisher's podcast that "nothing hurt him more than that relationship."
- Isaacson said the relationship was fraught with "storm and turmoil" that was "part of the attraction."
Elon Musk's biographer said the billionaire's relationship with actress Amber Heard hurt him the most — even more than Musk's fraught relationship with his father.