[he's still vaguely smiling, but here it turns sad again]

I tried. [he looks up at her] She was here when I woke up. And since she already knew about ... about being taken, and pregnant ... she wanted to know if we'd found her. And--why us. Why you. [he's starting to struggle with keeping his emotions in check again] All I know is what you said, there--that it was because of the--the Doctor. [a shadow passes over his face before he blinks slowly] And I--I told her that I held you, and that ...

[he was going to say 'that you were beautiful' but that's still too awkward for him to say in front of her. He sighs]

But I didn't tell her how ... how we found out that--um, that--she'd switched you--and I didn't tell her that you're ... you.