Updated

ORLANDO, Fla. -- A woman and her boyfriend are accused of the beating death of her 3-year-old son after he wet his pants.

Authorities say 26-year-old Robin Greinke and 33-year-old Steven Neil were arrested Thursday. They each face charges of first-degree murder, aggravated child abuse and child neglect.

Orange County Sheriff's investigators say Noah Fake died Tuesday morning. An autopsy revealed blunt force trauma to the boy's head.

Officials say the mother confessed to the attack after being confronted with autopsy results. The woman told deputies she was concerned about her son, but ate pizza and watched a movie with her boyfriend after the Monday night beating.

The names of attorneys representing the pair were not immediately available.