Any logical reason for that?
In my mind there are 2 things that can influence production (except the physical stats that mus be the base):
- Extreme love (devotion)
- Extreme fear (submission)
- Broken state (unable to maintain any willpower and accept all)
Beeing a guest could give a love bonus, why not, but I don't really see why a guest would produce more than a broken slave.
Beeing in an apocalyptic world, where one of the first action of the MC is to eat his grandpa, seems to be more oriented to rough and harsh attitude than to caring and loving ones. Be careful on introducing carebearing in such worlds