it won't always be so

Before I set off to pick Rosie up from nursery I commented
... I'm appreciating the robustness of my 3 year old daughter (5 mile nursery-run on bike in dark, 4oC, rain and 20mph wind), while it lasts. I imagine it won't always be so

I wasn't actually expecting her to fall asleep in those conditions, even though she does have a history of it