I think what we have here is a teenage girl. ;D Seriously.
Some are more grateful and helpful, but some are less grateful and helpful than her.
Does she have good friendships?
She's 17.. I was the exact same way at 17. I sat in my room all evening, I wouldn't clean my room or clean anything in the house. If my mom wasn't feeling well I wasn't going to cook or clean for her.. but when I was out of my teems, I'm 25 now I'm the complete opposite. When I was a teen my mom would tell me when I get a house it's going to be a mess because I hated cleaning as a teen. Of course once I became an adult I changed, I love cleaning and cooking, and am very empathic and caring. Most teenage girls are that way, they seem to lack empathy and such. It's nothing to worry about, she's not going to see your point of view now, but I garentee in Acouple years she'll grow out of it.