The story as I recall it does not really involve a kidnapping, more a rescue into slavery. Her source world was something like the happy facade over the Stepford Wives (she was too young to have been assigned a husband yet). The travelers find her and take her to their world.
The major element that really stuck with me that will make it instantly able to distinguish the right story is that after her introduction to the new world they offer a choice (I believe potion but magical at any rate) that would make her sleep until dead if she did not prefer where she was over where she had been.
