DramaDork, I sobbed too. It would make such a good musical. The first act could be the birth of the daughter (a la wicked) the diagnosis and the death.
The second act could be the daughter growing and watching the movies, the father finding a new wife and end with the daughters wedding. that would be so beautiful. And everytime the daughter would put in a movie, the person playing the mom would appear onstage like she was in the movie and sing to her daughter a lesson in her life.
"The only way we live beyond our lives is to connect and carve ourselves into the souls of those we love." -Little Fish