"Oh mom, I hate to leave you but I must. My time is up and it's as it's meant to be. The timing is perfect- I am getting sicker, faster. Tomorrow morning is perfect.
I will miss you in physical form but will come to visit often. Look for me! I will come back (reincarnate) if that is your desire.
What a nice life we've had together. Thank you for the life you gave me and the opportunity to be a helper. That was my purpose, as a family and person helper, and now I am complete.