As for the kiss, I'm probably the only one in fandom who thought Owen kissed her to shut her up and since she went with it, he kept going.

I think that's a fair argument. Here they are, hiding from a killer robot, and Gwen asks questions. Owen's trying to stay alive, man. I do think they both enjoyed the kiss and he was a little bit extra-protective of her afterwards, but if she hadn't said, "What should we do?" or whatever it was, it's likely that he wouldn't have kissed her.