I was under the impression, she left the train before it reached it’s final destination i.e. ran into a dead end. The patience she had with Lesley, and his “requirements” to be able to squirt were adorable. By the time she left, I think the youngsters Liviola and Liane had more or less taken the active rolls in the realm. I felt sad when Lucile left.
Funny was how she always tried to trap Livio into sex, and he played the game just until the plug-in, and then ran.