Robin Greinke, 26, and her boyfriend, Steven Neil, 33, were arrested Thursday.
The two face charges of aggravated child abuse, child neglect and first-degree murder in the death of Greinke’s 3-year-old son, Noah Fake.
Greinke said little in her short initial appearance before the judge at the Orange County jail.
She had been scheduled to appear before a judge on Friday but was on suicide watch and unable to appear. Neil was denied bond at his Friday appearance.
The two have been ordered not to be in contact with one another.
Orange County investigators said Greinke poked her son in the chest, pinched his cheeks and kicked him on Monday night.
Neil also kicked the boy, and slammed him repeatedly into the floor and rammed him headfirst into a wooden sofa frame.
Greinke and Neil ate pizza after beating the boy. They called for help on Tuesday morning when they found him unresponsive.
They also conspired to tell investigators that the boy had experienced a seizure and could have died from meningitis or that his injuries had come from a fall.
The two later admitted to deputies that they had been punishing the boy because he wet his pants.