I've tried using pillows on each side of the mattress but they just don't stay put. I've tried rolling/folding up extra comforters but they unfold and fall off the bed.
Any suggestions as to what I can use at the ends of the mattress to prevent this from happening?
She has a twin size bed, no poles or backboard. She takes up almost half of the bed. Not sure how far the bed is off the ground, I would have to measure that.