SOUTHFIELD, Mich. -- A mother whose children died after authorities say she left them in a car on a hot day for more than three hours was charged Sunday with two counts of felony murder.

Tarajee Shaheer Maynor faces up to life in prison if convicted.

Maynor's 10-month-old daughter, Acacia Darcell, and 3-year-old son, Adonnis Dominuque, died Friday after being left alone in a car while Maynor had her hair done, police said.

The 25-year-old Detroit resident was arraigned Sunday before Magistrate Eugene Friedman in 46th District Court. Friedman remanded her to Oakland County Jail without bond.

Maynor, who is due back in court on July 10, was not represented by an attorney, police said Sunday.

Southfield Police Chief Joseph E. Thomas called Maynor's actions "a hideous crime."

Thomas said the windows on the car were rolled up when the children were left. He said Maynor's hair appointment apparently took longer than expected, but the children should never have been left.

The weather was sunny in the area at the time the children were left Friday, with afternoon highs in the 80s, according to the National Weather Service, and the temperature inside a parked car likely would be hotter than the air outside.

Police were called to Providence Hospital where the children were pronounced dead at about 11 p.m. after Maynor brought them in.

Maynor initially told police that she had been abducted, raped and then returned to her car to find her children sleeping, police said.

She later changed her story, telling police that she stopped to have her hair done about 4:20 p.m. and left the children. When she returned more than three hours later, she found them dead, police said.

The woman said she then drove around for about three hours so that she could think of a story for authorities, police said.

Autopsies were scheduled to determine an official cause of death for the children, but Detective John Harris, a police department spokesman, said the heat inside the car was the likely cause.