Rose was trying to think, to decide, one, the other, both, neither, who knew, not her, being with the Doctor had utterly changed who she was, did she want either one of them, did either one of them want her, she got the feeling neither did sometimes...then others.
And where else would the Bad Wolf go to think, but the beach. She got there, wanting peace to make up her mind, but she found she wasn't alone. "Are...are you OK?"