Katie is forced to take a trip down memory lane as she visits the house she grew up in when her interfering mother, Vivienne, unexpectedly announces that she's planning to sell the property. But Katie finds more than she bargained for and unearths a disturbing secret that threatens to destroy her fond childhood memories.

Trudi is guilt-stricken, having spent the evening with Chris, and confides in Katie to seek guidance on whether she should reveal all to Richard. Katie advises her to focus on the future and forget about it, but will Trudi be able to live with her conscience?

The tension mounts as Mistresses concludes.

Trudi, Jessica, Katie and Siobhan are united in grief following the death of a loved one. However, emotions run high at the funeral and, with so many questions left unanswered, grief turns to anger and a bitter row ensues, causing a huge rift between the friends.