Have you checked if she still is interested in quilting? How long ago was the stroke?
Dad had a stroke in May 2015 and was in rehab for 4 months. He regained much of what he lost, but many things are a challenge.
I know every person is different and each stroke is different based on where in the brain it occurred. Post stroke abilities are different and new ways of doing things have to be found. Cognitive ability needs to heal as well.
Challenges I see:
Prepping fabric - washing, folding, ironing, starching.
Cutting fabric - scissors or rotary cutter
Matching seams - How can this be managed?
Pinning - I could not manage this one handed
Sewing - is her machine an old one where you have to nudge the flywheel to get started?
Quilt sandwich
Quilting - this could be possible if she has a LAM and someone loads the quilt for her or she quilts by cheque.
Perhaps there are other ways she can participate in quilting, if she wants too.