Is second Release Deed required?

Here is a situation: The property belonged to the joint family of Hindus. In a partition deed executed by and between the family members, ‘A’ gets the property. ‘A’ dies. He is survived by his wife ‘B’, two daughters ‘C’ & ‘D’ and a son ‘E’. The two daughters execute a Release Deed thereby releasing their right, title and interest in respect of the property in favour of their mother and brother. Thus, ‘B’ & ‘E’ became the joint owners of the property. Now the mother ‘B’ has also expired. ‘E’ has got the khatha of the property transferred to his name. Now the question is, should the daughters ‘C’ & ‘D’ execute a Release Deed again? We can say its not required because they have already executed a Release Deed. But, can it be interpreted this way: After the first release deed, B & E became the joint owners, with each of them being entitled to 50% UDS in the property. Now that B has expired, her 50% share will again go to C, D & E being Class I Legal Heirs as per Hindu Succession Act? For me to arrive at this logic is thinking this way: If son was also a Releasor in that Release Deed and property was released exclusively in favour of mother, then all the three children would have inherited the property after the death of their mother, right? So, can the daughters say "we get 1/3rd share in the 50% share of our mother"?