The New Mexico mom charged in the death of her 13-year-old son is taking a plea deal. 

Tracy Pena’s son, Jeremiah Valencia, was beaten to death and burned in a shallow grave. 

Pena’s boyfriend, Thomas Ferguson, allegedly beat the boy to death. 

Prosecutors say Pena, Ferguson and Ferguson’s son buried the boy’s body off a highway in Nambe. 

New court documents show Pena is scheduled to go in front of a judge at the end of the month. 

The details of the plea agreement have not been released.