It's about a person who got harassed at work by one of the bosses' niece. Basically, niece wants to call OP by a nickname that OP is uncomfortable with, and OP told niece that and also said if niece called her that she'd ignore it. Niece doubles down instead and took to calling OP by that nickname every chance she got (which all got ignored, of course) and it all came to a head one day when niece just sings nickname over and over loudly across the open office floor in an attempt to annoy OP enough to get her to respond (she didn't). Finally, the other boss storms out and scolds the niece and threatened to write her up if she continued calling OP by the nickname. During lunch, niece confronts OP, yells at her for getting into trouble, and calls OP by nickname again. The other boss happened to walk in and immediately wrote niece up.
Nice that the other boss stood up for OP, but this is why nepotism sucks. Niece thinks she can just walk over anybody because her uncle who doesn't even go to the office (the other boss handles most of the work) partly owns the business. Ugh.