I have a Little Sister and She is an Asshole

My mother and father had me, then split. My mother had children with another man shortly after the split. My father waited something like 14 years later to have children with another woman.

My mother's kids are cool. Very laid back and calculating. We all take care of ourselves, love each other and try to be good people in the world. My father's kids are ok but they are very spoiled and can be annoying. They are also young and have no concept of pretty much anything, including manners.

I've missed most of my dad's kid's lives. I've been away at college and work after that. I recently moved back to town to be around my family members. Its going great with my mom's kids. But my dad's kids... It's more of a challenge. Two of them are under 10years so they're small. The oldest is a female around 12 and she's large like I was at that age.

She's tall and heavy for a 12 year old. Basically she looks like she's 19 or 20 physically, but when she opens her mouth, holy shit is she annoying! She's rude and says horrendous shit. Mostly regurgitates whatever gossip my dad says, which is bad enough when he expresses himself (quite arrogant and obnoxious) but to hear a 12year old female repeating the same in a voice that sounds much like a goose honking... Well it's painful and annoying as shit!

I'm trying to figure out how to be in the same room with her without knocking her out. It's that serious! And this is strange for me, because I love to appreciate my siblings and cherish them. But she seriously annoys the hell out of me with the things she says and how she says them.

I remind myself "she is a child. No matter how she looks, she's a child. Help her not be an asshole." One day I asked her why does she have to speak in such an insulting way to people? She said "talking is hard." And my heart went out to her. Because yes, talking is difficult. I told her pay attention to how one of our cousins talks, and try to pay attention to how people react to her (because I'm sure people walk away from her when she starts talking, hell I've wanted to). Take her time and think before she speaks... And it worked for 1 minute then she continued honking along.

It's annoying. Totally!