Re: Late night talks...
Really just echoing Elinox on this one – but I'll add a bit more so I don't feel like I am just adding a +1 comment to the thread.
The night talking occurring three times does not seem too significant – if it were intrusive (such as spending a long time speaking) then I would imagine you would have been told after the first. Likewise, one's perceptions can be a little skewed when sleeping with another body in the bed; I know that when I am awoken, or still trying to fall asleep,the little movements of the other person/people in the bed can feel like they drag on forever, even if realistically it is only a very short duration.
The next part is where I get hung up a bit. I know next to nothing of Wicca, but the inclusion of the information that your girlfriend has studied it seems to convey that it is relevant to the situation. And, I may be incorrect in what little meager information I have, but my perception of Wicca was that it did not deal with demons/demonology as a core teaching. Regardless, I wouldn't trust someone that had been practicing Goetic magic for a long period of time to know what demons sound like.
Matched with that, depending on what one's perception of a demon is, being able to make “demonic” sounds with a human vocal range may be flat out impossible.
Goes without saying, I think, that dream induced mumbling matched with perceptions blurred by being close to sleep, or roused from sleep, seems more likely.
"Justice, like lightning, should appear, to few men's ruin but to all men's fear."