heather mack ,19 , smiled and laughed as she cradled her baby stella - born last month - in a holding cell at the denpasar district court .
heather mack , pictured smiling behind bars , is accused of the murder of her socialite mother , sheila von wiese-mack that the new mother took baby stella to court with her , who was born last month .
prosecutors have asked judges in the holiday resort to jail mack , left with baby stella , for 18 years .