Olivia and Sophia's sibling rivalry reaches new heights, and the whole family rallies around Aurora as she celebrates her first birthday as a single woman. Then, Sophia's boyfriend pressures her to tell Olivia she's moving out.

After Sophia finally reveals she's moving out, the sisters plan one last epic outing to say goodbye. Then, Aurora must come to terms with her new normal when she realizes her ex is starting to move on, and Olivia makes a big decision about her future.