****SPOILERS****
At the end of Kill Bill: Vol. 1, after The Bride butchers everybody at the restaurant, and finished off O-Ren, we see a scene of her talking to Sophie, threatening to cut off more limbs if she didn't give her information. It flips back and forth between The Bride interrogating Sophie, and Sophie being back with Bill. Sophie apologizes to Bill, but Bill is notably disappointed. He then asks Sophie "Does she know that her daughter is still alive?" And the film ends.