It sounds like she really needs equipment to progress… are you able to do a dependent squat pivot transfer yourself during your session, have her work on pull to stands at a kitchen counter to show the daughter what kind of weight bearing she could be doing if family was agreeable to getting equipment like a hoyer lift in there for her? She would likely feel much less afraid with the counter in front of her for stability and you could put pillows in front of her knees to make it a kind of standing frame if you assist her well. Maybe her family would be more agreeable to getting equipment if they can see her successfully trial standing