Spoilers: Season 2 Runner
She keeps her words to herself. What can she say anyway? She learnt long ago that he doesn't care about words much, because you can twist them so many ways. Words are deceptive, or rather people are, with them. He won't let her say 'I love you' because it doesn't mean anything to him. This means something. The touch of her fingers, the sensation as she grasps the back of his neck, pulling his head - his lips - to hers. And she can tell him how she feels so many more ways with other parts of her body too...