Everyone has some kind of quirk that brings them joy. Some people smack their lips while chewing, others hum while cooking, and there are even a few who overuse air quotes. Whatever peculiarity a person may have, as long as it’s not harming anyone else, other folks don’t need to have an opinion about it.
Unfortunately, the mother-in-law in this story didn’t get that memo. She was so annoyed by her son-in-law’s habit of sitting on his home stairs that she threw a fit over it and stormed out, leaving everyone puzzled.
More info: Reddit