Popsugar Entertainment Grey's Anatomy Meredith and Maggie's Relationship on Grey's Anatomy Grey's Anatomy: A Look Back at Meredith and Maggie's Sibling Rivalry September 12, 2016 by Amanda Rosenberg View On One Page Photo 1 of 11 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 They Have a Rocky Start Maggie is thrown in the deep end. She decides to tell Meredith that she is her half-sister and, unsurprisingly, Meredith does not take it well. Previous Next Start Slideshow Grey's AnatomyTVGifs