Similar to Jessica Mallery’s death, Siegel lost her daughter, Victoria, to a drug overdose at the tender age of 15 in 2015.

The 'Queen of Versailles' star's sister Jessica Mallery died of an accidental drug overdose at age 43, she shared via her charitable foundation's Instagram Jackie Siegel’s sister Jessica Mallery ...

Jackie wrote at the time. Jessica died of an accidental drug overdose, which Jackie acknowledged she was all too familiar with. "Jessica died after using cocaine laced with fentanyl.

Days after losing her husband, Queen of Versailles star Jackie Siegel is mourning the death of her sister, Jessica Mallery. She was 43. "As I mourn the profound loss of my beloved husband David ...

Jackie Siegel, who starred in the 2012 documentary 'Queen of Versailles,' announces the death of her sister Jessica Mallery three days after her husband David Siegel died.