Why would sleeping bother?

I swear.... sometimes I think M gets peeved at night just due to my sleeping postures and positions. Not flopping around. No, I mean, I think she reads things into whether I face toward or away from her (I am a side sleeper)..... Whether she believes I want to "be close" and whether I seem to be cuddlingish (is that a word?).

I sleep on one side or the other due to sinuses. I cuddle her when I am toward her and she's close enough. If not, she's not. No more to it than that.....

Then again, idle time and thoughts are one of her greatest emotional enemies. I could be reading something into the wrong thing. She may not be reacting to me at all, but rather, to thoughts that flickered at night, in bed, in the darkness, in her troubled mind.