girl2 spent all night in girl1's room sleeping on the trundle bed.

Hmmm, it was very strange sleeping without a small child. I haven't done it (except for one night) for almost six years.

Despite all the space, I couldn't break myself of getting comfortable by curling up on the very edge of the futon.

I wasn't worried about her, and I didn't get up in the night to check, but this feels to me like more of an event than when girl1 went to her own room

It's the last of my babies. It means I no longer have "babies." I have "children" now. I'm not sure if I've figured out how to be the mother of "children" yet.