Nicole retains her love for Dick, and tries to keep in touch with him. He lives in the U.S. and eventually begins working as a general practitioner in a New York town. Nicole hears he’s doing well, until some scandals ensue and he moves on.
Then he stops asking Nicole to send the kids. Eventually he writes that he’s working as a doctor again in another New York town, and it sounds like he might have a woman living with him.
The last letter she gets before the book ends is postmarked from another small New York town, so she thinks he’s there or in that general area.