Bypass Flow and 5150 and get her a decent board when they all start to go on sale within a few weeks. The Capita Space Metal Fantasy is a solid deck, and not expensive by any means. Also look at: K2 Luna, Burton Lux, Rome Vinyl, Atomic Fallen Angel, Gnu B-nice.
If she is having a hard time linking turns, get her a freestyle deck - it will be softer and easier to learn on - rather than a freeride deck.
For the love of God, stay away from Burton Stilettos. They were my first bindings: total crap for the price you pay. Go with Ride Vxn bindings instead. Or if you are willing to spend more: look for deals on last years K2 Virtues, Ride Dvas, or Rome Madisons.
I'm about her size and learned on a 143. I currently ride a 141 and love it.