I think Tony is the Sean of EE and likely to take over as the EVIL ONE from David Platt, he has this mad look in his eye He is going to show himself a bully and I think Carla has had enough of being bullied, so she probably does not care about him finding out about Carla's fling wih Liam. I also think she still loves Liam, accepting Tony's proposal was just her way of getting at Liam.