Meaning that the Doctor didn't like it any. She could see it in his face and hear it in his voice. There was something happening between him and Rose that he very much did not like. And Donna couldn't help the little sinking of her heart watching him sad like that. Her best friend was feeling heart broken and she had to go and accuse him of being an arse. Well done, Donna, way to be a bint.
Of course then he was off telling her how she'd gone home. And she knew that was a load of crap. Donna straightened up, jabbing her pointer finger into his chest. "Oi! That's enough lies out of you, mister. I want the truth and I want it now. Or so help me God I will... I will... Well! I don't know what I'll do but it won't be good for you!"