My aunt wants me to give gift to my nieces incoming birthday?

My niece is turning 14 and she's rich. I already gave her mother a gift and her 21th birthday brother a gift on their birthdays this June And I told my aunt I can't afford to buy my niece a gift this coming July because Im broke and I have so many expenses this coming July because I need to fix our houses and thar needed money for repair and Im planning to use my salary there plus she's rich she can afford nice things herself her father is well off. My aunt saw me gifting 2 of my nieces because they were graduating highschool a bag and I just can't afford to give right now and she said I have favoritism should I still give her a gift?
My aunt wants me to give gift to my nieces incoming birthday?
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