I think it's also telling that she liked Thesea when Theresa cried about her situation(she even said out loud she had a new opinion of her) but she turned on Theresea just as quick when she saw Theresa talking to Nany instead of her.
I don't see how anyone could dislike anyone for being an only child...That really doesn't make sense. I could see them using that as an excuse for her personality but I really don't feel that here. I know only children and they don't act like her. I just think, she, like so many others on the show, is emotionally unstable. I just think she also tends to have a very good, easier to watch side(when she's not wallowing in self-pity, she really isn't bad).
Honestly, the only person I like right now is Devon and maybe Johnny as they at least make fun of themselves some, and Devon sometimes speaks exactly what I'm thinking(like the whole "It's only 125K, go home!"