Nojochi-- Well, I do accept it when they present this as a romantic story rather than an abuse story, because I trust the makers of Trek. You could easily make up a list of briefly described events which this plot consists of, and think based on that list that it's all as you describe it. As it turns out, though, we watch the events unfold, and what do you know, everything's fine.
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It's true that Hedford had no choice, she was dying, this was the only way open for her, so it seems like she was sort of railroaded into all this. Having had no choice doesn't necessarily mean that the results had to be horrible for her. She could just happen to be thrilled with how it turned out.
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I think a lot of us, rightly or wrongly, see our own personalities as the roadblocks to achieving some kind of happiness that we're told is out there, somewhere. Maybe we/re too constricted, restrained, unemotional, don't take risks, too serious...? You can't sidestep who you are, though. It can feel like a sort of prison. Well, she got out by a stroke of luck. She got to become someone else who had a greater capacity to love openly.
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If you take the story as intended, awkwardnesses included I guess, you get an extraordinary story, about near-miraculous transformations. If we dwell on the problems you raise, it brings the whole thing down to earth. Trek needs to be extraordinary.