For a while you have no grandchildren, and then all of a sudden two come at once. Just like buses. After having four years of retirement, it's like going back to work. When you've just got into the habit of doing what you want to, when you want, it comes as a shock. It's like work. Certain things have to be done at certain times. (Feeding, nappy changing, getting them to sleep, etc. At least when I was working I could discuss the day's plan of action. Now my workforce just scream at me.
At least I don't have to pay them.