Had not thought of this until now, but DS got stung by a jelly fish, and being dumb midwesterners, we took him to the ER. I just got done paying $200.00 out of pocket and I wonder if Trip Insurance would have covered that. Oops.
Because I am goofy, I listen to a cruise show on the radio on my way to work on Saturdays, and this week they were talking to a lady from Travel Guard Insurance and she said that they cover "illnesses on anybody but your cousin" meaning that if your parent, aunt, uncle, self, children, brother or sister gets ill (even from a pre existing condition - which they acted like was a rare coverage) you can get your money back from a cancelled trip. She said they also help you with money theft... etc...
It was Comfort Cruises that does this show (they book everything and he seems like a nice guy) if you want to look it up online.