A First Look at the Castle/Beckett kiss! (video) 

Ugh. Yeah...so I think it's a cover because she clearly looks somewhere else. Also, I think that Castle kisses her first. That's why she looks shocked. and then she kisses him. Ugh..

Yeah I am starting to think its a cover too :/
But maybe they start kissing as a cover but then it becomes real? If that makes any sense! And that way they can go back to pretending that nothing special happened even though it did!
God, I have so many questions that can only be answered when the episode airs! Why isn't it the 24th yet?