She lives in an abandoned house with Clockwork. She and Clockwork sells the expensive stuff they found in their victims houses and use the money for living.
But in the story I wouldnt call Nina as a Jeff fan. After some time she realized her idolized version of Jeff and the real Jeff are not the same person and in the end she starts to hate him in a way. She wants to kill Jeff cus She wants to believe that her idolized version of Jeff is actually real and the Real Jeff is just a doppelganger. She knows that the idea of all is stupid but also doesnt want to believe that all that she did for him was for nothing. She hallucinates the version she created sometimes in the story and her insanity worsens as the story goes on.