Helping children cope with death

I am looking for suggestions to help my son (age 10) cope with the pending death of a close family friend. My good friend is loosing her battle with cancer. She probably will not make it through the night. She and her husband have come to acceptance of death as inevitable. Her children still struggle greatly. The oldest will turn 17 next week. The 3 youngest are adopted and foster children. Their lives have already thrown way to much loss their way. I told my son today that Kelly is dying. We discussed cancer and briefly touched on her suffering. Mainly I just touched on the fact that she is having difficulty breathing and the doctors state that she cannot survive the cancer. I was gone for 3 hours today, at the hospital. My son spent this entire time, curled up in bed, and then on the sofa, covered head to toe in a blanket. I was able to get him engaged in activities once I got home. He made a picture for me to take to the hospital tomorrow. For a little background. Kelly was my son's babysitter when he was at his raddiest. That is until we recognized that he could not be managed in a private home. He became way to possessive of Kelly and would not permit her husband or children to cut into his attention from her. Kelly's oldest son, was my son's first teen babysitter. Just this Sept, her oldest daughter started watching my son after school. He's now back at daycare, while Emily copes with her own needs. Kelly lives just 3 doors away, we visit there a lot. He loves to be at her home. I think the chaios of 6 kids in the house is very inviting to an only child. I will definatley take my son to the viewing at the funeral home. Will take him to the funeral if he seems to need/desire this. I have already allerted his aide at school, since he's very prone to depression (in addition to scar tissue from resolved RAD, my son also has bipolar disorder). I am grateful for any ideas or suggestions. DimasMom