Anticipatory grief
The five stages namely, denial, anger, bargaining, depression, and acceptance proposed by Elisabeth Kübler-Ross in her model of grief describe the process by which people undergo after a loss. Anxiety, dread, guilt, helplessness, hopelessness, and feelings of being overwhelmed are also common. However, it is important to note that anticipatory grief is not simply normal grief begun earlier.
Grief
Siblings who play a major part in each other's lives are essential to each other. Adult siblings eventually expect the loss of aging parents, the only other people who have been an integral part of their lives since birth, but they do not expect to lose their siblings early; as a result, when a sibling dies, the surviving sibling may experience a longer period of shock and disbelief.