A pre-trial hearing is being held today for a New Milford woman accused of having inappropriate sexual relations with a teen.  Krystal Jones pleaded not guilty to 12 felony charges including sexual assault, illegal sexual contact and risk of injury.  The charges against the 34-year-old were filed in April in response to an investigation into a complaint lodged with the Department of Children and Families.  The 15-year old initially denied having a sexual relationship with Jones, but police say they found messages and images related to a suspected relationship.  Jones posted bail and was released from custody May 9th.