Does the aunty know that the child with you is the same child, if yes how. Why was this secret not maintained.
Your affidavit with tahsildar matters, what is written in it, does it state about the uterus operation or only the delivery of the child or about abandonment of the child. This fact is required to help you further.
Why the aunty, what happended to the mother of the child. Does she also claim the child.
Are they doing it for money.