Mimi, that's awful. They should have taught her how to use the walker and made sure that she could with her weak arm.
As for the fracture, it really depends. If it's a crack they may do nothing except having her use something to help her walk, they might put her in a brace and it get progressively more involved after that. There are instances where surgery is required to stabilize the fracture. Does she have a referral to see an orthopedic surgeon or for any kind of medical follow-up?
Living life like there's no tomorrow.
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2007 Look Dura Ace
2010 Custom Tonic cross with discs, SRAM
2012 Moots YBB 2 x 10 Shimano XTR
2014 Soma B-Side SS