Cynthia Nixon, best known for her role in Sex and the City (less known for her inclusion in Mombian’s “Most Powerful Lesbian Moms” list), has become an ambassador for breast-cancer organization Susan G. Komen for the Cure. Nixon is a breast-cancer survivor herself, and the daughter of a two-time survivor.

She spoke with Good Morning America’s Cynthia McFadden this week about her own battle with cancer, how she explained it to her children, and what she thought of the Sex and the City breast-cancer storyline, which aired before her diagnosis. She also answered the ever-popular question of what the kids call her and her partner.

ABC News has video of the segment. (There’s a 30-second commercial beforehand.)