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                   208059 Points
                   Joined July 2016
                
               
			  
			  
             
            
              @  pranjit dutta: " ...she is likely to attract huge penalty chages......"
At this stage there is uncertainity about any HUGE PENALTY. So, need not worry to that level; but be prepared to pay liable taxes. The penalty may not be harsh in genuine cases.
Deposite the cash to her account. By way of Gifts (smaller amount), some part may be deposited in her relatives, or your account. Finally file return of this year and pay tax as per her slab. Some available deduction under section 80C, 80D etc may be availed.
Finally, get prepared for any penalty. 
Take help of local CA and check if the (rental income) return of earlier years can relieve you to some extent.