Ethan scattering his Dad's ashes and Peter thanking Ethan for cutting his baby's umbilical cord.
After Ethan's insistence that Peter's kid is probably really Darryl's, Peter leaves an accusatory, passive-aggressive message on Sara's answering machine. She calls him back about it later. She's not angry - only concerned for her husband - and affirms that she would never cheat on him. She's telling the truth.
Peter helps Ethan pick up his dad's ashes after Ethan drops them and starts crying.