I think everyone's taking the lyrics too literally. In my eyes, Lillian is just a person who is unhappy with a relationship but feels obligated to stay in it for whatever reason. The references to film are just a sort of metaphor for the act that she puts on, where outwardly she doesn't show how she really feels. I think that it's more plausible that Casey wrote this song using film as the central motif and not that he wrote it explicitly about any one scenario.
I think everyone's taking the lyrics too literally. In my eyes, Lillian is just a person who is unhappy with a relationship but feels obligated to stay in it for whatever reason. The references to film are just a sort of metaphor for the act that she puts on, where outwardly she doesn't show how she really feels. I think that it's more plausible that Casey wrote this song using film as the central motif and not that he wrote it explicitly about any one scenario.