To get the nun you have to use the sex machine in your office, then there's gonna be a scene that night where the nurse takes the cum out of it, just talk to the nurse at her home or office (dont remember which), sleep a couple days see her in her office again but with helen then skip a few days (it wont let you in her office until its time) then see the nun a few days in a row and shes corrupt.
As for Mali I'll get back to you on that
EDIT: Just talk to the nurse again then go to the porn studio it gets straight forward after that, I still haven't found the scenes after that looks like Rei gives birth and you get to fuck Lisa and corrupt Albert
Let me know when you find out what needs to be complete for Rei gives birth and get to fuck Lisa and corrupt Albert
After Mali and complete the studio, I am getting nothing.