She curses him as only someone who is half-demon on her father's side can curse.
Madness string 2147
When I first saw the Demon, my response was simply, 'Tentacles!' because I saw a mass of tentacles and I thought it was adorable.
People who pride themselves on their 'complexity' and deride others for being 'simplistic' should realize that the truth is often not very complicated. What gets complex is evading the truth.