Tax query on f&o trading

I have been trading f&o with my own capital but from the trading account of my mother I.E. transfer of capital from my a/c to mom’s a/c . I have a contractual arrangement (undertaking) under which all losses and profits on trading would be passed on to me by my mother. So as far as the loss or profit in an FY is concerned on F&O who takes that in the IT return me or my mom…?

@San78 Can you.
Also is there any agreement as that which is valid?