"I remember one noon having deli food (which Dorothy loved) with her and Bob. Bob told Dorothy that he'd heard she was the model for the Nude Descending the Staircase. She didn't deny it; she said she'd known Duchamp in Paris.* To my eyes, she did have the large, angular shape of the Nude. Who knows?" --- from Some Memories of The Catholic Worker by Judith Gregory.
This painting dates from 1912 and was exhibited in the famous Armory Show in New York in 1913 when Dorothy was in her mid-teens and living in Illinois with her parents and siblings, or maybe she was already at college. Anyway, she had not met Duchamp at that time. RS.
*Dorothy told a confident many years ago that Duchamp had tried to seduce her, presumably when she was on her honeymoon! RS