The American heiress is being spared the firing squad thanks to the birth of her daughter behind bars.
Mack is breastfeeding her newborn baby during brief breaks in her murder trial on the paradise island of Bali.
She gave birth to baby Stella two weeks ago and plans to raise the infant in jail for the first two years. The child is already suffering from health problems, including developing Jaundice in jail.
Stella was born with six fingers on her left hand and will need surgery.
Mack's boyfriend, Tommy Schaefer, the baby's father, is also accused of murder. He, too, wept when prosecutors announced they would not pursue death by firing squad.
If convicted, Mack is expected to serve 15 years in prison.