AAAHHHHHHH Calgon take me away!!!!!

Ever have your teen DD ask you for help then while you're helping she yells "I know just hold this part mom" like 'just shush up & do what I say, don't try to help me' (but remember she asked). She's complaining that her bedroom isn't big enough to hold everything that she has ASKED FOR. I remember her wanting her computer table but now she claims it's too big & doesn't fit. Her dad keeps buying her whatever she wants. If she wants a new smaller dresser, he will likely get it. She called me up to her room about 5 times to help her put together a DVD holder, I have to keep stopping typing. If you are of that age...do you remember the Rolling Stones' "You Can't Always Get What You Want"? I keep thinking of that, but don't litterall say it cuz it'll just start a fight.
I noticed my SIL just doesn't say much when her girls start arguing about stuff so I think I might do that...to keep my blood pressure down.
(My son isn't like that, but yours might be.)