Marie is Miles's ex-wife and the grandmother of Phillipa and James. She was married to Miles for twenty years. She blames both Cobb and Miles equally for Mal's death. Despite the tension, she allows Miles and, reluctantly, Cobb to remain in contact with Phillipa and James.

After Cobb is forced to flee from the United States after Mal's suicide, Phillipa and James wind in the custody of their grandparents. Marie appears to be their primary caretaker as Miles is residing in Paris as a professor of architecture. She does not have faith that Cobb will be able to return to his children, stating as such to Phillipa, which she reveals to her father when Cobb calls his children after the failed Saito Extraction Job.