1) You have stated that you bought property from deceased MR T . If sale deed is not registered then sale deed has to be executed by the legal heirs . Admittedly one of legal heirs is wife and minor daughter of Mr sathis
2) for sale of minor share in property court permission would be necessary
3)insist that legal heirs obtain court consent before sale of property
4) court would grant permission subject to condition that sale proceeds of minor share be placed in fixed deposit