Nick drops Rocky and Willa at a kettle pond on the way home from the beach, planning to drop off Jamie and Maya before walking back to join them. The pond is crowded with kids and dotted with algae, prompting a goggled boy to 'boysplain' that it's seaweed. Willa wryly predicts that even with a future biology doctorate, men will still miscorrect her.

Mother and daughter swim out past the rope with pool noodles to the cold middle of the pond. Willa performs an underwater somersault, and they share their mutual snake phobia, which Rocky inadvertently passed down to Willa from infancy. Rocky reflects on Willa's college admissions essay about the pond, which wove together memories of learning to swim, Jamie teaching her about molecules, Rocky's mother showing her blueberries, and Willa coming out to her parents there.

Rocky recalls Nick worrying the essay didn't emphasize leadership enough, and her own profane defense of Willa, which dissolved into a hot flash. Nick arrives, wading in to join them, and the pond's acoustics carry his greeting clearly. Willa reminisces about Jamie's invented Summer Olympics relays and medal ceremonies with Mardi Gras beads, including a moment when teenage Jamie played it cool in front of a girl he liked.

Willa admits she always wanted more siblings, wanted more kids around. Rocky agrees aloud, then privately acknowledges that she had wanted more children too.