Tracy Barlow discovers her sister-in-law's affair in 'Coronation Street' this week.
The Weatherfield bitch finds out Leanne is cheating on her step-brother Peter Barlow with her ex-husband Nick Tilsley after overhearing her talking to love rival Carla Connor and wastes no time in causing as much havoc as she can.
Jane Danson - who plays Leanne - said: "Off all the people to find out! Carla is having a row with Leanne in the Rovers' loos all about Carla being in love with Peter, and Leanne's affair with Nick. But unbeknown to either of them, Tracy's behind one of the cubicle doors - and, of course, she's loving every second as she comes out. But of them are mortified that Tracy knows their biggest secrets."
Leanne tries to threaten Tracy (Kate Ford) but the convicted killer is having none of it and runs home to tell mum Deirdre (Anne Kirkbride) and stepfather Ken (Bill Roache) and is stunned that they already know.
Nick (Ben Price) then comes to the house and secretly begs Leanne to run away with him and has booked a one-way ticket for her to Italy so they can be together. Although Leanne throws the ticket in the bin, Peter (Chris Gascoyne) finds it and wonders what is going on.
He then confides in Tracy, who acts shocked and surprised and viewers of the iTV1 soap are left wondering whether she will tell him or not.