Spending an afternoon daydreaming can be a great way to unwind or reduce stress levels once in a while. It becomes a problem only when this distracts a person from reality or makes them overlook the wonderful things in their own life.
This is what happened when a man let his colleagues think that he was actually married to his pregnant sister-in-law. When his wife found out about the fantasy life he had created, she felt extremely hurt and insecure. She didn’t know how to handle the situation.
More info: Reddit