A few thing that could be interesting:
-Some computer could have "Security camera" video clip, to show how some of the girls end up into the fleshwall or to show the respawn point of the new area maybe etc...
-Mental health could trigger other nightmares, having to use the few bed to take nap.
The more mental health she lost or the corruption/infected the less she get raped by human in her nightmare or dream.
That way you could re-use the "Rape scene" or any scene that doesn't fit the story anymore or creature that are difficult to have roaming around.