Donna takes a breath, "Right before you two start fighting. Doctor, this is Andrew, he's a meta-crisis from a different universe than us... or from our future, I still don't understand that."

She takes another breath, "Märet is a meta-crisis born from Andrew and we're not sure who. He was a hand in a jar, we all got one from the Ood..."

She tapers off, she doesn't really want to think or remember these events, "I got one too. But mine was killed by the mistletoe, which got me locked in my own head."

She looks between them and returns to the present, "So I don't want no fightin', ya hear? You two've got nothing to fight over."

She ends with giving both of them 'The Look.'