We've really been encouraging Monica to be attentive to James and respond to him when he has needs. If he's fussy or on his own, I'll often ask her to bring him a toy or just go talk to him. It took a while, but she's really starting to get the hang of it and often responds to his fussing or chatting without being prompted. The other morning, James was being particularly fussy and Monica decided to cheer him up. This time, she went a little overboard.
"James...do you want this in your nose? How 'bout this in your nose?"
"Monica what is that?"
"James...in your nose?"
"Monica, is that a booger?"
"Boogie...in James nose?"
"No, Monica. Thank you for being so generous, but we do not share our boogies with anyone. Let's get a tissue."