Keith Scott Brown, 55, was charged last week with abusing Desirae, 32, Deondra, 30, and Melody, 26, all members of the popular Julliard-trained quintet of siblings. The women had chosen to be identified in court papers.
The elder Brown arrived in Provo, Utah, courtroom with scratches to his face from Monday's crash of his Porsche that sent him and his wife, Lisa Brown, 54, to the hospital. The accident occurred four days after charges were filed.
In an agreement with prosecutors, Brown pleaded guilty to sodomy on a child under 14, and two charges of sex abuse of a child, all felonies.
At his March 31 sentencing he faces a term of 10 years to life in prison.
Mat Szwajkos / Getty
In a statement posted on the group's Web site before the guilty pleas, the siblings thanked friends and other supporters "for their concern and prayers on our behalf during this trying time."
"One of the greatest sources of joy and satisfaction in life is the opportunity to share our music together and with fellow music lovers throughout the world," they say.