Once inside, the box is locked as she is stuck in place as a man proceeds to use vibrators and dildos on her as she is made to cum by the unseen man outside of the box.
Dr. Mercies was feeling down. He worried his life has been consumed by filth. So Lily became a very filthy being for him--the Goddess of the Loo. She absorbed the doctor's bodily fluids and inner sadism into her own being.