Don't get me wrong, with "predatory" I didn't mean to indicate some form of conscious behaviour targeting my money, nor do I think that she is faking her current engagement. I guess that in the end we are just giving different names to the same phoenomenon: feeling of love and attraction that adapts very quickly to better circumstances. All in all, it's a very effective survival mechanism for her (and for a fair number of women I happened to know/study), it's just emotionally wrecking for those on the other side... But now that I'm (very painfully) aware of this possibility, I just need to calibrate for that and go on with my life.
Ah, I see what you mean. You're right that I misunderstood you.
On an overly cynical side note, men adapt this way to more suitable partners too. It's just that we usually don't fall in love with resources and social status, but boobs and pretty faces.
Information that surprises you is interesting as it exposes where you have been miscalibrated, and allows you to correct for that.
I suspect the users of LessWrong have fairly similar beliefs, so it is probable that information that has surprised you would surprise others here, so it would be useful for them if you shared them.
Example: In a discussion with a friend recently I realised I had massively miscalibrated on the percentage of the UK population who shared my beliefs on certain subjects, in general the population was far more conservative than I had expected.
In retrospect I was assuming my own personal experience was more representative than it was, even when attempting to correct for that.