Diane Pierce

Diane Pierce is the mother of Maggie Pierce.

History
Diane came to Seattle, a surprise to her daughter. She quickly bonded with all Maggie's colleagues, who all liked her. She was there to have a consult with Jackson because she had a rash and wanted him to get rid of it. He examined her rash and took a biopsy, which showed inflammatory breast cancer. She asked him to help her tell Maggie and he said he would and also offered to refer her to local specialist and fly to Hawaii to operate on her.

Diane then went to Meredith's house where she folded laundry, made lasagna, and put the kids to bed. When Maggie came home and confronted her mom about her behavior, Diane decided not to tell her and instead just said she'd leave and when Maggie was ready to have her in her life, she could let Diane know.

Romantic
She was married to Maggie's father. However, she had a long-term affair with the man who fixed their car. They ultimately split up over it. She said leaving Maggie's father was the moment she finally felt like she could breathe again.

Familial
When she surprised Maggie with a visit, Maggie was upset that she didn't give her advance warning that she was coming. Maggie also disliked how she quickly bonded with the other doctors at the hospital.

Friendships
She quickly bonded with all Maggie's colleagues. She made plans to have dinner with Richard, but cancelled those plans when she was diagnosed with breast cancer.

Career
She makes soap in Hawaii.