Another day, another nanny drama. A Texas babysitter has been arrested for forcing a 4-year-old boy to perform a sex act on her.

Esmeralda Marie Medellin, 18, was left in charge of the boy when she abused him. When the boy's mother returned, he told her what Medellin had made him do. The boy also said the babysitter performed a sex act on him too, so the mother called the police while the babysitter was still in the home.

Medellin was taken to the police station that night and she denied the claims. She and the boy were later taken to a hospital for a sexual assault examination. The result of the examination came in last Wednesday and it revealed that DNA found on Medellin's breast belonged to the boy, police said. The test also found male DNA on her genitals, but there was not enough to make a positive comparison with the boys' DNA.

The teenage babysitter was arrested on Thursday for the alleged sexual assault, which police say occurred on March 28. She has been released from Bexar County Jail Friday on $75,000 bail.