it is very common for old sibling relationship issues to re-emerge and heighten when as adults they are confronted with caregiving for a parent. often siblings will differ about how the older adult should be cared for and depending upon their own family responsibilities either pitch in or withdraw. one family member usually assumes the role of the primary caregiver as you have done and may resent her disengaged siblings. caregiver support groups offer adult children the opportunity to vent their feelings and learn how others cope in similar situations cope. the alzheimer association has chapters nationally and you might be fortunate to have one nearby. perhaps they can help you be proud of your efforts to improve your father's quality of life and lessen your frustration and anger at those less involved.
how can i handle my sister who is not helping me care for our dad who has alzheimer's disease?