They reckon that Claudia's new fella Marc will turn out to be a transvestite. Claude and Aude will suspect Marc is seeing someone else when he stands them up - and the pair spot a mystery woman leaving his house. They don't twig that "she" is Marc and when they confront him he convinces them it was his sister. But the truth eventually comes out that he's a Corrie cross-dresser.
Oh well, takes all sorts I s'pose.
