Lyla wasn't used to this cuddling thing with him. She cuddled with Chance all the time and she did more of this sort of thing with Adam than anything else.
But Matt.. he was that guy she slept with and then felt guilty about later. She definitely wasn't used to this side of him or just laying here and cuddling with him without him making any sort of move on her.
It was nice, though. More than nice, it was just what she needed at the moment and she probably was a little too comfortable, because maybe about halfway through the movie, her eyelids had drooped and she'd drifted off to sleep without really meaning to.