If you want to be fully convinced of the abominations of slavery, go on a southern plantation, and call yourself a negro trader. Then there will be no concealment; and you will see and hear things that will seem to you impossible among human beings with immortal souls.
I still like the relationship part of any story. You don't want your character to figure everything out and then at the end of the day, go home and eat soup from a can by herself.

