My sister is almost a teenager and its fucking me up. I am 2 years older then my sister ad recently she has developed this attitude. Anytime were out and theres a wait like for food she gets on her phone, now i understand that she gets bored but every time i tell her something she responds sarcastically and is making me fucking pissed. She responds in this know-it-all attitude and responds with ''Great wonderful amazing." or "Okay.." Its pissing me off because we have a small age gap and shes acting like a brat. I had a pimple in the corner of my mouth and she pointed it out and said "I popped mine because people were bullying me." Like i dont give a flying fuck. Its getting worse because were both on the heavier side and we have a pool so every time i jump in she says "Whale!" If im being completely honest shes the reason i want to go to the gym because her comments are hurtful.