Camryn Leigh Taylor of Quakertown has been charged with indecent assault, endangering the welfare of a child and corruption of a minor.
Central Bucks Regional police said they received a complaint of a child reporting being sexually abused by their babysitter, identified as Taylor.
Police said the child reported details of inappropriate conduct with Taylor "at her instruction."
The child said the abuse took place in their home on several occasions during the past year.
Police said Taylor told the child not to tell anyone what happened.
Authorities said Taylor admitted to the crime while being interviewed by detectives.
Taylor turned herself in on June 16.