Even if they had not visited every day a bed sore is a common and preventable and treatable problem that is the responsibility of the nursing home staff. The family was probably told not to move her and that everything was fine.
IT IS BASIC CARE OF A BED BOUND PATIENT TO CHECK FOR SORES DAILY.
Blaming the family is just wrong.
yes bed sores can be prevented but if the patient refuses to allow repositioning what can you do...I had a patient fully aware refuse even to use the bed pan rather than get up to a commode...she preferred being changed.