Mom is angry I bought my dad a birthday gift?

I’m 22F. My mother and father are divorced, they split over 10 years ago. I get pocket money and I also have a part-time job. My father’s birthday is coming up, and I wanted to get him a present (with my own money from my job.) . I told my mom and she got really angry. She said that if I get him a gift for his birthday, in that case she will stop giving me pocket money and will take back presents she bought me in the past.

does she have a right to do that? How do I navigate this situation?

Mom is angry I bought my dad a birthday gift?
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