I think Carla getting smacked might have been played a bit better, if she had been hit that hard that she fell to the floor, she should have a big bruise or fat eye in her face. It is clear though that there is still a big spark between Carla and Liam.
I like Violet's sister, she is a bit like Roxie in EE or Lexie in Emmerdale, a little minx who will turn many of the men's heads, I am sure.