Is it normal to think that your girlfriend's the devil?

Hi,

Last night, i was in bed with my girlfriend, with the lights off cuddling and kissing etc. She was on top of me, kissing me, and then whispered to me that she was 'in control'. Now of course i knew what she meant in this sense, but i suddenly freaked out and thought that it wasn't her, i didn't beleive that it was her face, and i kept calling her name, asking her if it was her, and if she was the Devil. I don't remember much, but apparently I told her that she wanted to control my mind, and shouted at her, and told her she was working for the some kind of Demon in hell, and that she morphed into a girls body to control mortals of this earth. She also wrote all of this down. I also then went onto say that 'Spider-man', the charecter, was the main devil. - Is this normal? Please note, i didn't sleep for a good 25-26 hours when this had happened, but have never experianced the side effects from sleep deprevation.