Why do they grow up

Someone posted a thing on Facebook the other night about the "Last Time".

When was the last time I nursed Pixie-- clearly there was one time that was the last time. There was one time that I held her close and had her nurse.  I don't remember when this was- which is sad- I feel like there should have been a way to mark that.  This is true for all of the kids (except LittleDude) who is still nursing.

When was the last time I picked up Stinky and carried him to bed? Or put him on my back? There obviously was a last time but I don't know when that was.

I don't know what "last time" will be next.  Will it be the last time I "muggle" Pixie and Peas?  Will it be carrying them to bed? Reading them a story? When will it be the last time to hold their hands to cross the street?

Even knowing that that this last time is looming- it can be hard to appreciate the little things.  It can be hard to remember to cherish the snuggles, the talks, the hand holding. I hope I can learn to value this time as much as I should.