Dinner at the In-Laws' Starts at Noon, Don't Be Late

My in-laws' family has a bizarre ironclad rule: dinner is served at exactly twelve o'clock.

Everyone treats this rule with utmost reverence and follows it to the letter.

I had just moved back from another city and accidentally broke it.

So I received a severe punishment that was completely outrageous.

In the end, this absurd family rule tore the whole family apart,

and the person who made it was finally left all alone.

Want to know what this family rule was?