[Seraphim]

Lee, in my opinion, is a master manipulator. He can talk his way out of anything,as we have seen over and over again. Casey obviously has feelings for him, triggered by being handcuffed to him, sharing a bed with him and the intensity of the situation. They share a similar sense of humour and fun and he fancies her too.. However, Jasmine is exotic, sophisticated, seriously cool, intriguing and has an American accent. So he fancies the pants off her and probably sees her as a step up from Casey. He has reeled them both in. Jasmine wasn't buying all his crap, but he has made her cry twice now - she might be a better actress than I'd imagined, or he might be a better liar than I thought. Either way, Lee failed the task in order to stop Jasmine from revealing more of what he'd actually said to her, and salvage the situation in a very cunning way which promised nothing to Jasmine, yet promised everything.. and could easily be explained away to Casey, who eagerly seizes all the crumbs of hope he flings in her direction.

What Casey is hearing from Lee is: "I don't want a relationship yet because I am just out of a messy break-up. But no-one else has ever made me feel the way I feel when I'm with you. Jasmine was just a mad, crazy thing and she'll soon be going back to America. You and I can't know how we'll feel how we get out of the house. Meanwhile, there's nothing wrong with staying the way we are, and seeing what happens." He's already treating Casey like she's his girlfriend, spending all his time snuggling up to her in a sensual way and sharing a bed, so she's fine with that.