'My mother-in-law turned up in a wedding dress at my own wedding.'

The most important item a bride must decide on ahead of her wedding is the wedding dress. It’s often the first item that is organised after that engagement ring is slipped on her finger, that is, if it hasn’t already secretly been decided on or at least considered ahead of the proposal. Once the dress is sorted, the rest just seems to fall into place.

“Fall into place” as in it’s painstakingly organised by the couple down to the very last detail.

Once the day arrives and everything is in place, it’s time to relax and enjoy the day. That is, as long as someone doesn’t try and ruin your day by being impossible.

Enter your mother-in-law.

Mamamia Confessions: The thing I secretly want to tell my mother-in-law.

This story isn’t about all mother-in-laws. Not all relationships involving mothers-in-law are difficult and maybe this one didn’t have any issues ahead of the blessed event (although that’s hard to imagine). While this story is scant on details, one thing is obvious.

The mother-in-law turned up to the wedding wearing a wedding dress, and the bride was pissed. Who wouldn’t be? It’s just not done.

This mother-in-law may as well have arrived wearing a t-shirt saying, “I hate the bride”, or “You’re not good enough for my son”, or perhaps she could have rolled around on the floor throwing an almighty tantrum during the ceremony. Even that would have been better. At least then the wedding video would have been interesting. But no, instead like many unhappy motherd-in-law before her this woman chose a perfect act of passive-aggression.

This story was shared on website Whisper along with 20 other stories of nightmare mother-in-laws in an article called, 21 infuriating tales of mothers-in-law who got off on ruining a wedding.

“My mother-in-law wore a wedding dress to my wedding,” the bride wrote.

“She also got so drunk and disorderly that my brothers-in-law had to take her home.”

It's hard to predict how this marriage is going to turn out with tension on the day that should have been the happiest, most romantic, loved and supported days of their lives.

Really, it's the stuff of nightmares.

MIL: "This isn't a wedding dress. It's a cream dress and I've had it for ages."

BRIDE: Spluttering in disbelief, unable to speak.

GROOM: Feeling slightly nauseous, decides to play dumb in order to keep them both happy.

Hopefully this is one of those families where the mother-in-law and her son aren't very close, or if they are close sadly live far, far away from each other.

MMOL: Til death do us part is over. Should marriages have a time limit?