Just to set expectations for @Sah006, it's usually a short processing time if it's just a missing original doc that they've already seen via CEAC or something like that.
But if it's 'proper' admin processing with more detailed background checks it can take a lot longer, even a year or more. It's not clear which visa route @Sah006 is going down (please do fill in your timelines people!), so not sure if the documents relating to his/her family members are for extra background checks though, or just documents that should have been provided and were missing.