Go low key. A simple manual cameral loaded with tri x pushed, etc.
Do the simple stuff. Existing light. Medium wide angle, so some dof in existing light. Zone focus, or if too dim, string length focus.
A close up of a younger one holding her hand.
A pictture of any valued photos etc, arranged by her bedside.
Make it just a sideline of your dropping by to visit.
Make the time to vist with maybe a dozen images. The visiting will stay with you with an image or two to remind you of the time you spent.
Time spent photographing without making the conversation is not the same.
Do be pragmatic. Find out when she might be more alert, as opposed to napping.
See if it lines up with when the highest levels of available light occur.