Is it permissible to take a portion of my share of my father's pension without my mother's knowledge, given that the pension is deposited into her account?

If the questioner is certain that the money is her property and her right, there is no harm in taking it. However, she may not be aware that her mother spends her full right on her in various ways of expenditure, or saves a portion of her money for her. Therefore, we advise her not to take anything without her mother's knowledge, as long as her mother provides her with the necessary financial support.