Vicki is truly retired now, with no part-time job even. So she is available for more babysitting.
But before, when Trenton would come over for babysitting, Papa was usually there. But now he knows Papa has to "take off work" to be there and play.
It's apparently Papa's realm to play with toy trains, tinker toys, and lincoln logs ... Vicki does tickles and reading and movies much better. She gets frustrated building things. So apparently the other day, he said "Nana, we need to write Papa a letter and tell him to take off work."
To be independently wealthy.