Tiago Cardoso’s review published on Letterboxd:
If I were underwater, who would I want to save me?
A mermaid. People who have postpartum refer to it as feeling as though they’re underwater. When you have a child, your life literally goes from zero "mermaids" to "mermaids" everywhere from toys, cookies, cartoons, books... A huge symbol for being a parent.
Tully is a kind of Mary Poppins too. Shows up not just to help with breast feeding, but she shows up to save the family, and when the family is saved, it’s time to go.