Chris Galford said this quote

That was magic, sweetest.” The witch flexed her fingers, wriggled them in front of her. “Did she think it a wave of the hands? A slip of the tongue?” A kiss upon her skin. She could see the woman reaching out and taking her in hand, kissing each finger as though they were her possessions. Then it was gone. Charlotte blinked. The woman had not stirred. “Not all things are so simple. I was he and he was me and I took your poison into myself, and made it his. All things join beneath the earth. I burned, then so did he. More will burn. Come hair or wool, more will burn.