It's awhile before she speaks, because she knows that once she admits what happened, it'll all be real. He'll have been real, he'll have been here and that sweater hanging over the chair in the corner will actually still smell like Lee.

"He erm, he was here." Donna looks at Rose, who she's never had cause to mention Lee to and then up to the Doctor. "He was a real person, Lee was. So if you're looking for Time Lord code, I'm fine. Oh, I'm the finest."

The tears that well up in her eyes start to fall, but Donna refuses to legitimately cry. There will be no sobbing, not until she's alone again.