It is a known fact that all daughters-in-law have problems with their mothers-in-law.

Anyway... One day the daughters-in-law all got together and decided to
apologize to their mothers-in-law for everything they had supposedly
done wrong.

A week later the daughters-in-law decided to take their families
(including their mothers-in-law) on a picnic.

The mothers-in-law were all in one bus, which was the first to leave.

On the way their bus had an accident and all the mothers-in-law died.

All the daughters-in-law were devastated but one in particular was
more heart broken than the rest.

Everyone tried to console her by telling her that at least her
mother-in-law had died without any tension between them.  But still
she cried.

Eventually when she was calm enough to speak, the other women asked
her, 'Why are you crying so much?  Was your mother-in-law that
special?'

The woman, sobbing uncontrollably replied... 'No, she missed the bus!'