JDA

Hello sir, A query regarding a JDA. As per the will the fathers property has been transfered to only 2 sons (3 daughter & 2sons -children) instead of 5. Then they made a JDA and constructed a flat with builder. 10 flats out of which 5:5 was the share as per my knowledge. 2 daughters where given the share by executing a gift deed and they have also paid some 7 lakhs inspite of gift deed. And the same has been asked to us as the above and we have told them that documents is required for verification and after the execution of all the registration formalities amount will be given in form of DD. But they were telling like they will sell the flat but still they have not sold the flat instead they have given it for rent. What are the possibilities 1.As they are not able sell the flat. 2. Is it feasible to give the money even after execution of gift deed. 3. Will the property be their own as per the 12 year rule. Please guide me on this. Regards Vaman