Is the property an ancestral property? If yes, then the right to a share in the ancestral property comes by birth. Therefore, your 2nd sister can claim share.
If your father want to divide the property and give it to you and your first sister then for that getting the consent of other members of the family to divide or sell the property is needed.
Please note, If the property was not acquired by your great grand-father then its not an ancestral property.
If the property is not ancestral then your father can partition it to give it to you and your first sister.
If the property is ancestral then if the property is partitioned then it loose the ancestral nature and become self acquired one.