PHOENIX - Late Monday afternoon, Susan Brock pleaded guilty to three counts of attempted sexual conduct with a minor.
She changed her plea before Pinal County Superior Court Judge Pro Tem Hank Gooday.
Brock was arrested after she allegedly has a sexual relationship with a 17-year-old boy.
A probable cause statement said Chandler police were called by the teen's parents after they learned of steamy text messages reportedly exchanged between their son and Brock.
Brock is the wife of Supervisor Fulton Brock. He has since filed for divorce.
Brock's daughter was also arrested for allegedly having sexual contact with the same teen.
Brock was arrested at the end of October and initially pleaded not guilty to charges of child molestation and sexual conduct with a minor.
Because the teen was 14 when the crimes reportedly occurred, they are considered as dangerous crimes against children.
Sentencing is set for March 16 in Pinal County Superior Court.
Brock faces up to 15 years in prison and she will have to register as a sex offender.