Imagine one house, with four people, but five couples. How does it work, asks Jo Fidgen.
Charlie is talking excitedly about a first date she went on the night before.
Next to her on the sofa is her husband of six years, Tom. And on the other side of him is Sarah, who’s been in a relationship with Tom for the last five years. Sarah’s fiance, Chris, is in the kitchen making a cup of tea.