I agree with all of this, except for the boundaries he pushing not being sexual. I think, in a way, they are. He's looking for something that shows she returns his feelings and when he listened to the tape, he heard her say she wished that the guy would be stronger. I think he acted on that, believing it to be the truth for how she liked men in bed. I think she was telling the truth. If she had to see that guy again, she'd rather be able to hate him for being lousy in bed or distance herself from it by making it less...loving isn't the word I want. Having it feel less intimate by utilizing force? I can't word it very well.

But yeah, they already have a relationship and it's clear that there have been little things along the way that build on that. Like the necklace he gives to Martha, Elizabeth knows giving him *that* necklace to take to her will upset him because of what meaning it had between the two of them, no matter how often she wore it or didn't wear it. I wonder if we've seen her wearing that necklace in any of the episodes, I should go back and check.