Mackenzie Shirilla 's legal troubles weren't the focus of one particular jail call with her mom ... her booty was. In a recording obtained by TMZ, Mackenzie and her mother, Natalie , spend part of a conversation laughing over comments Mackenzie received after one of her court appearances ... with a friend apparently fixated on how she looked rather than what was happening in the courtroom. Take a listen to the exchange ... Mackenzie reads a message from a woman named Kendra , who says she