Power of Attorney in Delhi in case of no blood relation

My father was a power attorney on behalf of his sworn sister (no blood relation) and was defending a suit for possession of the property since 1999 now the appeal is in the Hon'ble Delhi High Court. Last year in 2022, I lost my father to Covid. nnI want to know whether my father's sworn sister can execute the Power of Attorney in my name? As it is clear that I am not related to her by blood will that be an issue? nnIf the answer is yes and she can execute the PoA in my favour, even if she has her son present but she is not willing to give him the authority? nnCould also provide me with the legal reasoning/basis behind your answer? nnfor me, knowing the legal reasoning is important because I have been told by an advocate that in Delhi now the PoA can only be given to a blood relative due to some changes in rules made somewhere after 2010. Is that correct?nnThank you