[He's quiet for a few moments, stroking his fingers through her hair thoughtfully.]

...Did she tell you that's how she died? Jumped in the way of a bullet that was meant for me.

[The Doctor's voice is soft. Not sad, necessarily, because he has Jenny back, though the memory and the pain that it entailed sobers him up.]

I was going to take her with me. Instead she died in my arms. ...I almost...I almost killed that man.