As the saying goes, what does it mean to eat at home but not at home?

This means that the married daughter can often come to eat her family's meals. Maybe you are here to eat, but outsiders will say that this girl is filial and often comes back to see her parents when she is married, but her family's house can't live for a long time, so outsiders will laugh at her parents. Look who his daughter is looking for. She doesn't have a house to live in when she gets married. This does not mean that you are married and come back as a guest.