Am I in the wrong?

I'm going to be honest i don't know how to explain this I've tried to write this like 3 times already but it's either too detailed and to long or not detailed enough so it doesn't make sense but basically me and my aunt don't get along and i just now found out that she talked shit behind my back to my cousins and their parents when she went to florida For a bit to visit family and have fun at Disney with her daughter
But not only that I'm 99% sure she stole my money before I mean it was only a 100 dollars but it still was my money and she always acts different around me than when she is in front of my parents when she is around my parents she acts all nice and sweet but when she isn't around them and she's with me she does a complete 180 giving me attitude and trying to control what i do and say like she literally told me to shut the fuck up when I was in the car with her today even tho I wasn't even really talking and ironic enough she also said that I should learn more manners and be more lady like bc people might talk shit about me even tho the only I talking shit is her anyway there's more but let me get to the main point I finally had enough with her Bull shit so I told my parents And my parents also having enough of her bull shit decided to have a serious talk with her tomorrow to get her shit together and realize that just because her own daughter won't listen to her and just bc she can't control her don't mean she can try to control me just bc she knows I'll listen bc I was Brought up to respect my elders but i don't know if that was a good thing to do because i don't want things to get awkward between us because i literally have to see her almost every day i'm also worried about things getting weird with my grandmother because she's literally like a mother to me and i don't want her to be mad at me bc even if we have a good relationship at the end of the day my aunt is still her daughter