Was it a death bed vision?

My mother in law has kidney failure, she's very pale and breathless most times. We have a feeling that she will leave us soon. She spoke of a nurse from the 40s coming to see how she was feeling and to collect something. The same elderly nurse who used to come to check on her ill mother (about 50 years ago). This was two days ago. Today her legs feel cold up to over her knees. This nurse wasn't a family member or a friend but would now be deceased. Was this a Death Bed Vison? She's not constantly in bed, she's mobile. The skin around her eyes is red and itchy. She itches badly all over and is losing weight rapidly oven though she eats her meals. She's not overly hungry anymore. We asked a few times about the nurse visiting and she is adamant she has been to see her.