Humor helps. You do what feels right, listen to your gut. I struggled at times but I do remember the moments of light permeated by finding the bleak humor in things too. I think it's fine to play the cancer card, hilarious in fact, in day to day moments, if the person can handle it. You are bringing much needed light, and Mr. Darcy and cheesy romance novels are always a good idea! ❤️👍