EPHRATA — A Grant County women accused of sexually abusing her children and broadcasting it on the Internet has pleaded guilty. The 30-year-old Warden, Wash., woman pleaded guilty Tuesday in Grant County Superior Court to four counts of first-degree rape of a child. Police say she performed various sex acts on her 9-year-old daughter and 7-year-old son. The Grant County sheriff’s office says the woman took photos and made videos that she sent to people through an Internet chat program. Authorities were alerted by the National Center for Missing and Exploited Children. Each count of child rape carries a possible sentence of 20 years to life in prison. She is scheduled to be sentenced in December.