Elon Musk took to Twitter to share a new family photo that included his girlfriend Grimes and their 10-month-old son X Æ A-Xii posing in their new Texas city he called ‘Starbase.’ Elon Musk, 49, and Grimes, 32, showed off a memorable moment with their son X Æ A-Xii in Texas on Mar. 8. The