This has been discussed before, but from the way Winnie talked about her room, and throwing Nora's corset down the passage way, I have always believed that she was in a tandem style room. So perhaps she was in berth 1, room E-100; rather than in E-101.
Just my thoughts on the subject from what I recall Winnie saying.
Information does not suggest such arrangement. From the biography of Marie Jerwan: "She occupied a cabin on D-Deck together with Ada A. Ball, a widow from Bristol, England. Noël Malachard, René Jacques Lewy and another man had the opposite cabin of theirs."