how to stop mom from taking my money

my mom is horrible with money if she see it she HAS TO SPEND IT I'm trying to save (no even a big amount literally 10 bucks or smt) and she is ITCHING TO SPEND IT and like she's mom I can't say no to her. but I did now and it's so hard. she knows how to emotionally manipulate me and I'm doing my best to hold on lol. any tips?