Dave, I lost my Mom 13 years ago to cancer and I was with her until the last breath.  The agony and pain she suffered through made it a real relief to see her pass.  I knew there was no going back and was happy for her when it was over.  That night is the night I fully understood that death is the ultimate healing.  She knew the Lord and had lived her entire life for Him, so her death, while very sad on one hand, was a joy on the other.  I'm looking forward to the day I can join her in God's presence.  Heaven becomes more precious with each loved one that passes.