I wouldn't say that the characters of Joan Crawford and Lionel Barrymore characters fall in love at the end of the musical version of "Grand Hotel", exactly.
I'd say that they are helping each other out. He want to help someone live the way the Baron helped him live and She is alone and pregnant and needs the help. And She knows that He is dying and will need someone to help him as he grows weaker.
I do adore this show.
I have a demo recording of the songs from "At the Grand" and some of them are really bad. One of them rhymes "foyer" with "Charles Boyer"...
"A coherent existance after so many years of muddle" - Desiree' Armfelt, A Little Night Music
"Life keeps happening everyday, Say Yes" - 70, Girls, 70
"Life is what you do while you're waiting to die" - Zorba