Persephone is not going to initiate intimacy with Henry. But she will carelessly flirt and make herself available, so to speak, allowing herself to be used if it happens, by anyone who would like to, frankly. If he (or someone else here) does make a move, how it happens will likely determine whether she goes along with it or not. If no one does, she will simply try to fall asleep in someone's arms, even if they remain fully clothed.
The poor girl has just been brutally assaulted and then went to hell, after all; she is dissociating, drunk, and desperate for anything to provide some comfort and solace.
PS This sort of reaction is in line with my own personal experience coping with PTSD, but please let me know if my RPing it makes anyone uncomfortable.