Just for info's sake and because I love playing it. I went in on my cult leader .. well really I've been setting him up.
He got to the point of getting the keycard and he and his assistant went down to the mother. I had one open the door (you can pass the key between family members in the inventory) and I walked them down like zombies because I didn't know if they would pass out .. but then I had to wait until the possession passed. I might not have needed to walk them down like that.
Anyway they made friends with the Mother until they could get gifts. I really enjoyed that they can do that.. like have a fountain of youth in the mother if they want too. It looks like you can request one daily gift also. So this will be great for my power hungry cult leader sims.
Another thing I love is when you have them eat the fruit I think they stay a zombie like 3 hours but all their needs green up ... and when that possession wears off they are perfectly green. So.. better than a full nights sleep. You could fill up on fruit and roam the sim world.
I've been able to pass it in the Doctors career to patients and in the Detectives so far... I'm going to get use out of this... and if I get tired of it I'll rotate around until I feel like doing it again.
I love that Invasion of the Body Snatchers take on it.