Zack starts to think that he may not be pulling his own weight in the living situation with Billie. He attempts to help out around the house by purchasing a new, water-efficient toilet but has troubles completing the task. Zack's good intentions go bad when he sneaks into Billie's room to use her toillet and end up accidentally peeing on her. The bathroom fiasco leads to a big fight over boundaries. Billie grows increasingly unsatisfied with her living conditions but has a change of heart when Abby and Olivia draw attention to her unreasonable behavior. Soon after Billie apologizes for her behavior, another fight lands Zack back to living in his van. When Billie feels the baby kick for the first time, shes goes to apologize to Zack and bring him home.