All of the above.
I feel like the soppy Tevye in "Fiddler on the Roof." I may break into warbling "Sunrise, Sunset, quickly go the days . . ." at any moment and break into choking sobs at the quick passage of time. I may flail my limbs and weep.
Tick tock tick tock tick tock tick tock. You're dead!
Or I may enjoy watching her happen for as long as possible and count my blessings that I got to be a part of her life and she of mine.
Or I could eat a cookie.