I always interpreted it to be that a girl's friend (Jennifer) was murdered, brutally, and her fear is being murdered herself and the trauma. The "just relax, just go to sleep" struck me as a boyfriend/husband/significant other trying to calm her down and failing. Maybe the event happened a long time ago, and she's been very scared because there've been more murders since then. The murder is maybe a serial killer?
I always interpreted it to be that a girl's friend (Jennifer) was murdered, brutally, and her fear is being murdered herself and the trauma. The "just relax, just go to sleep" struck me as a boyfriend/husband/significant other trying to calm her down and failing. Maybe the event happened a long time ago, and she's been very scared because there've been more murders since then. The murder is maybe a serial killer?