Whenever the heroine in the story lost her battle with cancer I couldn't help but laugh at it.
Do you think you should apologize to her?
The apology thing is taught during our first grade, I don't think it applies to the present situation.
It is not okay to laugh about cancer. People can die from cancer and people will think you are cold-hearted to laugh about it.
It's just a story and the heroine was dumb.
It may just be a story, but laughing at people going through horrible things will make you seem very rude. How would you feel if someone had a serious disease who you cared about?