Inheritance must apply in the absence of any proved will

my father filed a suit for possession by stating himself to be a self acquired owner against me by stating as any licensee. But during the pendency of that suit, he expired. Thereafter my elder sister filed an application U/o 22 Rule 3 CPC on the basis of any forged/unproved will to become Lr of plaintiff/my father to continue the suit for possession against me. Please note that such forged Will is already strongly challenged by me in separate probate court. So, i want your expert advice that when such Will is already subjudice then whether still my elder sister can become Lr in the possession suit or that suit will be abated. I want to ask this question as I have a reasonable arguement that according to me when any Will is subjudice then court must presume inheritance untill any will is proved and hence I being the class I heir automatically become 50% owner by succeeding my father by sec 8 so the possession suit itself becomes meritless. please answer my query