Hope x-ray is ok so she can come home. I fractured L1 & L2 last yr & am absolutely fine now. It was 12 weeks to the day before I got back on a horse for a gentle walk & it took about 6 months before I felt the core muscles were back to where they were before the injury.
I didn't realise how much they weakened by not being used with 8 weeks in a back brace. I am close to 50 so I'me sure a younger fitter person wouldn't lose as much strength.
Good physio helped. Back is occasionally a bit stiff but that's old age I think rather than any after effects from the injury.
One of those grabber sticks was really useful as was a perching stool to put by the bath so I could lean over to have my hair washed. I also had a raised loo seat which helped as well. All were provided by the NHS.
It wasn't a pleasant time but worth taking things easy to allow the healing to take place properly.