Which Episode Does Maggie's Mom Die?

[This story contains spoilers from Thursday's “Be Still, My Soul” episode of Grey's Anatomy.]

What season does Maggie's mom die?

Click here to see more pics from Season 13 of 'Grey's Anatomy'! Later, during an emotional talk with Riggs and an intimate hug that followed, Maggie finally decided to let her mom die on her own terms.

Does Maggie's mom die in Season 13?

Diane Pierce was the mother of Maggie Pierce. She ultimately died of inflammatory breast cancer.