S1, E2: Helen, Jake and Natalie are shocked when they discover Vivien plans to sell their childhood home and go travelling with Mark. Meanwhile, each of the siblings' personal problems are growing: Helen's actions at work have severe repercussions in her marriage, Jake is stunned to hear that Leila might be moving on from him, and Natalie's affair starts to threaten her physical safety. To make matters worse, Vivien and Mark make a snap decision on holiday that almost breaks neighbour Mary's heart.