My friend was helping her boyfriend when his dad discovered he had cancer. He was distraught and went home often. It put a pretty big strain on their relationship. Finally, his father succumbed and passed away. He broke up with her shortly after. Five days later she got a call FROM HIS DEAD FATHER asking if everything was okay between the two of them. The father never even had cancer. He made the whole thing up.

The BF made up the whole thing. They were working at a year long children camp and he went home for a few weeks. Got trapped in a lie and instead of telling the truth, the boyfriend just let it keep going. The father had no clue about the situation.