Cousins suck sometimes

Dude tell me why my cousin is becoming such a bitch now that I'm standing my ground? For context, my dentist said I should go cold turkey off sugar, and I instead just decreased my intake and have been more conscious.

My sister left me cookies and cousin #2 was cleaning the pantry and found them. My elder sister asked who's it was, and I lied saying that our sister left it and will come back for it. Cousin #1 (who knows I haven't gone cold turkey) said "Oh Damien just throw it away at this point". So I made a gesture to get the point across to cousin #2 that they were mine, but when I did it to cousin #1 she outed me and said "Hey Damien says it's his, he just wants to eat it, throw it away he can't have it".

Like??? Dude I can literally tell everyone that your boyfriend cheated on you and you took him back and that you let me do your essays for you in school, don't try me. Take me seriously bc I can literally ground you and I will absolutely use my unfair privilege of being the youngest child of my mom -- YOUR AUNT -- to win, arse.