A 27-year-old south-central Nebraska woman accused of having sex with her teenage stepson has pleaded not guilty.
The Grand Island woman has been charged with child sex assault and incest.
The woman made her pleas Tuesday in Hall County District Court.
The Associated Press is not naming the woman to protect the identity of her stepson.
Police say the boy was 15 when his stepmother began having sex with him.
Investigators say the boy's father called police to report he had seen his wife having sex with the boy, who is 16 now.
Her next court hearing is scheduled for December 5.