I'm a 21 year old sister to a 17 year old brother, 7 year old sister, and a 4 year old brother.
My 7 year old sister is 7 going on 16, and it's becoming worse. Although, she is extremely intelligent (she's a grade ahead), she has one of the worst attitudes I have ever witnessed. I know a lot of peoples' first reaction is, "Um, she's 7", but she says many hurtful things (things 7 year olds should never even think about saying) to our mother, myself, and our brothers. The past year she has been going through a very "jealous stage" where she believes everyone is getting more attention than her (which couldn't be further from the truth), and she's inconsiderate of anyone's feeling, and just a brat in general. She doesn't understand how good she has it, and doesn't appreciate anything! We've tried so much, but it only works for about 2 days, then she's right back to her ways!
I've even come home a lot more to spend time with her. I know that she misses me, and I take her out for a "sister's day" and I know it makes her happy, but the next day at home, my mother tells me she's a riot again.
We really don't know what to do with her. My mother and her boyfriend went to her school last week for a conference, and told them that even though she's a bright and intelligent girl, she's also the "mean girl".
We have run out of ideas, and it's to the point where I don't even like visiting anymore, and my 4 year old brother says he "hates" her!
We're not going to give up on her, but we are running low on what to do with her.