What is Sister-7 doing ?

There are seven sister in a house in a village where there is no electricity or 

any gadget.

Sister-1: Reading Novel


Sister-2: Cooking


Sister-3: Playing Chess

Sister-4: Playing Sudoku


Sister-5: Washing clothes


Sister-6: Gardening


what is Sister-7 doing ? 


What the sister number 7 must be doing?

She must be..... 

Source 
 
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