Mary Bonnet and Chelsea Lazkani ‘s feud on Selling Sunset is one of the biggest storylines of season nine, but if you don’t remember last season’s details, you might be confused by the history between them.

The two reality stars and real estate agents are clearly not on friendly terms in the new season and things blow up between them mid-way through the season.

So, what happened?

It all dates back to a moment in season eight that kicked off the feud.

Mary and Chelsea were working together on a co-listing in season eight and Chelsea showed up late for an open house event, which was attended by the whole office.

But, when Chelsea showed up, it was her outfit that caused all the drama.

Chelsea wore a blazer and a very short skirt that Mary didn’t deem appropriate f

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