Honestly, I don't think that things will go into "and then they screw" territory any time soon. If this ship is going to set sail, it needs to get out of the harbour first. Claire has pretty much stated that she's never had a relationship, *and* has anxiety issues (hence the Ativan scrip), so I don't think that in this arc, it'll go beyond maybe some smooching, and ending up like the wedding arc, except where she doesn't switch beds in the middle of the night. It'd make more sense from a storytelling perspective, since it'd provide more time for things to grow, and develop the evolution of not only Marten and Claire, but the other characters in the story as well. And like any good harem anime, even sad Emily would still love her friends.
Jeph could, of course, twist the knife and make things fall apart. But given that for a little while, I hadn't been getting as much out of the comic as I would have liked, no matter which way he takes things, I know that I'm seriously hooked.
As a side-note, when Claire first appeared, she rather annoyed me as a character, since I just saw her as "girl Clinton". I'm glad that she's developed far past that into a much more interesting and endearing character.