Shades of John Travolta and his first love who also was about 20 years older and died of cancer, right in his arms, or some such BS. Remember that?
Hope this isn't the Death Knell for Diane, LOL!
Nah,
My guess is that Keanu and Diane live a long, long time together, just like my 80 y/o Uncle Dolph and Aunt Lynn (who's 10, no, er...13, no uh, mebby that's 15 !?!) years older than he.
Seems she misplaced her birth certificate ;)