FORT LAUDERDALE, Fla. (AP) _ A baby sitter accused of killing a 3-year-old girl by forcing her to drink nearly a gallon of water has lost custody of her own children, officials said.

Nancy G. Gayoso, 35, and her husband Guillermo, 31, appeared Thursday in Broward Circuit Court at a closed hearing during which prosecutors asked Judge John Bowman to terminate parental rights for her son and two stepdaughters.

Hollywood police spokesman Tony Rode said the custody case was sparked by allegations of a sexual nature.

Neither the Gayosos, nor their attorney, Laura Chukwuma, would comment after the hearing.

In October, Gayoso was baby-sitting for her tenant's daughter, Rosita Gonzalez, when the girl had a seizure and was taken to Memorial Regional Hospital in Hollywood.

She died of water intoxication the next day, according to the medical examiner's office. Drinking large amounts of water can lead to a fatal chemical imbalance caused by a low concentration of sodium in the blood.

Gayoso was arrested in March and charged with murder.

Gayoso claims she left Rosita in a bathtub for 25 or 30 minutes and the child accidentally ingested the water. Chukwuma has blamed the child's death on the hospital's medical treatment. Hospital officials have refused to comment, citing patient confidentiality.