My sister died of cancer one week ago at the age of 39 and leaving behind a 5 year old son. I regret I didn’t spend more time with her because I didn’t want to go to the park or do other “entertain the children” activities (I have none). She was the most lovely sister in the world. You simply don’t realize the clock is ticking. Now I will go to the park with her son more often. But she will not join us and that is super painful.