Will my mom get mad at me for spending the money?

well theres this adorable hello kitty purse at this store it's the hello kitty embossed bag and my best friend and i have been saving money together to get us some nice purses ^_^ but mine cost 86 dollars and i really dont mind because i did chores and earned the money i just feel like my mom will get mad at me for getting the bag. its a gourgous bag and i have wanted it im just so on the line about buying the bag. i feel like she will get mad at me for "waisting her money" should i get it? please give a good answer. no dumb answers not in the mood thanks for the help :)