Lets go with my character having secret hopes of it turning out exactly like we know it is going to turn out, however she doesn't really think it is going to happen. This can lead to firstly, her having some preparations in place such as lube, or maybe even a toy, and secondly, give her motive to push the sexual tension along, as she really<em>wants</em>it to end up where it does, however doesn't actually expect it to :) I would like my character to be almost as naive as the rest, the only difference being that she has imagined how it ends up, so pushes it that way, only slowly and subtly as she won't believe what is happening.