Hi Pat,
My mom died at age 67 as a result of a terminal disease. The last year of her life she and my Dad moved in with my sister and her husband. We were able to have her at home until she died. This was possible because I have a great crew of siblings. Looking back I am grateful for the simple things, holding her hand, conversations on a wide range of topics. That last 6 months was difficult at the time and I cried every nite on my drive home praying that God would end her suffering for her and me. Every nite I thought I couldn't do another day but somehow I did and in the end and to this day I regard that time as a gifted difficult as it was. Make memories, spend as much time as you can with your Dad be cause you wont get the chance for a "do over" and I promise you will never regret it. Above all be extra kind to your siblings for they are having their individual experience with all of this. Talk with God ; be angry atHimif that's how you feel. God can take it and more and loves you just the same.

Look up letter to Rachel written by Ram Dass. It was written to parents who had lost their daughter but parts of it are apropriate for any such loss. It may be of great comfort when needed.

God bless you as you travel this path