Ah, by hooking up I meant entering a relationship, I tend to use the two interchangeably sometimes. Even then, I'd be more then a little pissed, just because I would question the sincerity of Dora's statements at that point. If Dora had said "hey, it doesn't work between us", that'd be one thing, but my interpretation is that Dora said "I can't date anyone because I'm too effed up". Important detail to me in that regard. If Dora and Marten talk about it, and Dora's does the "hey, I feel better about dating, but it'd be too hard to date you again", then it's all good, because it is being open and honest with Marten about where they currently are.
Once again, it depends on how Marten feels. I'm just afraid Marten will take it on the chin, rather then stand up for himself. He might see it the same was as many folks, which is, hey, if it makes Dora happy, go for it. But he also might be a bit hurt, and resent it a bit, and hold it in...which leads to many, many bad things.