The Doctor stopped, leaning against a tree and on an impulse stroking back some of her hair from her forehead.
"I'm sorry. I should have already explained, just so caught up in the how of it all. The idea would be you'd be human plus Time Lord DNA. You'd regenerate, same as me. You won't have my memories though, so it shouldn't overwhelm you." He smiled a little, kissing her forehead.
"And I don't know. I don't think it will hurt, but the only times I've used it I already was in pain. Don't think it made it worse."