Gima, perhaps she felt awkward coming right out and asking and threw out the line about your calendar hoping you'd then initiate.
Said "she'd" take the kids instead of "we" for the same reason.
"What do you think about it?" Again, take the bait so I don't have to come right out and ask.
"Do you want to go with us?" Ta-Daaaa! Had to come right out and ask.
I don't know, but if this isn't "how WASs test the waters" it sure seems to me that this is how your wife tests the waters, and that's all that counts. I don't read it as an afterthought.
It's all goodness, IMO. Big change. You, sir, are doing it!
Gardener
"My soul, be satisfied with flowers, With fruit, with weeds even; but gather them In the one garden you may call your own." Cyrano deBergerac