1. What does your aunt want now? Is she going to accept the marriage or create trouble for the newly married couple,
2. Has your sister left any message before leaving her house?
3. It appears that the boy's family is scared that your aunt will create trouble to them for which she is asking for the marriage documents,
4. it is also to be informed why does she want the said marriage documents,
5. Your aunt can arrange to conduct further religious ceremony or arrange for social marriage to give her assent to the said marriage,
6. She can ask the boys family to ask her daughter to inform that she is well and also that she is accepting the said marriage,
7. The boys family is not bound to handover marriage papers to your Aunt,
8. However, if she still thinks that she needs to see that her daughter is safe and keeping well, then she can file a Habeas Corpus petition before the local Hogh court praying for a direction upon the police to present her daughter before the Court.