Mariah Antetokounmpo, wife of NBA star Giannis Antetokounmpo, is opening up to fans of the basketball star about a personal struggle. "Being vulnerable nowadays is kind of scary, but if I can help just one person, I believe sharing my story is worth it," Mariah wrote via Instagram on Sunday, September 28, revealing that she has struggled with postpartum depression following the birth of the pair's fourth child, Aria Capri.