At first, Nadia and Esmi found many things in common, both are painters and enjoy the exoteric and phycology. Things started going south when Esmi had to clean all the mess that Nadia was leaving in the kitchen, and also because Nadia doesn't help to clean the common areas of the apartment. They had an argument last month, but after a few days everything went back to normal. Only a couple of weeks ago when Nadia brought Sara and Daytona over to spend the night and Nadia didn't clean the mess that they left in the kitchen, Esmi went to the bathroom where Sara and Nadia were and demanded to Nadia to clean the mess. They had many conversations by text messages that we don't know the content. All this is what I got from what happened in the apartment.
Nadia even told her husband, or ex-husband, that she hopes that the next tenant would be a party girl that brings many men over and leave a mess just so Esmi gets mad at her. In her mind, Nadia thinks that the apartment is always clean and Esmi is a clean freak. This is why I believe Nadia did what she did last night, just to poke on Esmi.