I hesitated in replying to your post because there just isn't any answer to your question Why. Just want to say that whether people here reply to you or not, anyone who has read your message will have you and your sister and family in their prayers. I know you will somehow find the strength to comfort your sister.

Sandra
My mother's caregiver
Diagnosed 6/02 (at 84) with Stage 2 tongue cancer; surgery 7/02
Diagnosed June 03 with recurrence of tongue cancer and cancer of soft tissue under ear