Anonymous participant your not supplying good info. Did your mother write a letter and provide bank statement proof? Regardless, it's not a given in your circumstances, possibly the employer sponsor might fly.
You'd get a 12 month statement from the bank showing the activity, as well as updating your bank book on the day of the extension. But you still need to comply with the pre extension minimum 400K 800k banked funds method I believe.
what John was saying is, they can ask to see every page of your passport and proof of current location as a document request before they issue the visa.