A 2-month-old girl died in her mom’s bed in Brooklyn Monday morning — less than two days after a 3-month-old Bronx boy was discovered dead in bed by his mother, police sources said.

Brenda Peguero, 29, told cops that she had fed her daughter, Jalissa Maldonado, at 2 a.m., then woke up six hours later to find the baby unresponsive, the sources said.

Peguero called 911, and EMS rushed to the Bedford-Stuyvesant residence and attempted to revive the infant at the scene, but couldn’t save her, the sources said.

A police source said the mom accidentally rolled onto the baby, and that she won’t be charged.

The medical examiner will determine the cause of death.

On Saturday night, 3-month-old Mark Ruane Jr. was found dead in his mother’s bed in High Bridge.