I believe David and Nola are indeed blessed with an extraordinary relationship and perhaps now she is larger than life and no doubt 'present' in spirit (as she always was).  I wonder what makes a person live so fully and joyously as she did. She must have had a really good start in life.   I know David was Nola's rock and with complete and unconditional love, and easy going manner. It was the catalyst that kept her fire burning I'm sure.