After agreeing to leave their kiss in the past, Tina gives Rob a friendly peck on the cheek - but they're being watched by Peter.
Tackling his brother-in-law later on, he claims he's doing so to protect his sister Tracy, but when Rob accuses him of fancying Tina, he's on the receiving end of a thump.
Storming round to Peter's flat to confront him about the attack, Tina's ready to end the affair, but their passion for one another comes to the forefront once more and they start to tear at each other's clothes.
However, Roy begins to come up the stairs, startling the pair, and as Tina struggles to get her clothes back on, she hides in the bedroom.
Will Roy find evidence of her being there with Peter?
Find out in tonight's hour-long episode of Coronation Street - December 30 - at 7.30pm on ITV.
Tagged in Coronation Street