SAN ANGELO, Texas -- State child welfare officials are conceding that a newborn’s mother, who belongs to a polygamous sect and has been held in foster care as a minor, is an adult.

A Child Protective Services attorney told state District Judge Barbara Walther on Tuesday that the mother of a boy born April 29 is not a minor. She had been held with underage girls since CPS moved more than 400 children from the sect’s ranch to shelters across the state.

The San Angelo Standard Times reported that CPS would continue to seek custody of the newborn.

The baby was the first born to a sect member in custody. A second was born Monday.

More than two dozen girls held in state custody claim they are actually adults.