You signed as the husband/guardian of this girl, which is a recipe for disaster as by doing so you have admitted your marriage to her, thereby allowing her to exercise all the legal rights and remedies which are vested in a wife according to the law of the land. She can file a criminal case for rape against you, which you can contest on merits. Apply for anticipatory bail as soon as the case is filed. The punishment can be up to 7 years apart from the civil liability.