Well at least they are taking care of him/her since he is in a female body, it's better than being left in the woods to be eaten or die from hunger or thirst, live a good life for a while then be sacrificed doesn't sound that bad as long as the sacrifice is quick as painless as possible.
I wonder did he instead of reincarnating actually soul swap with the person that was meant to be in the body he is in or maybe his original body became an empty vessel then someone put their own soul into his old body and is now controlling it.