Based on the context and the answer, generate a question. 

Context: She 'd broken his neck , but that was before she knew he was her brother . It made her wonder when her expiration date was . They 'd been created around the same time after all . Speeding up , Max decided a super - charged flight would help clear her head , and soon she was pushing her top speed .

Answer:

Because she wanted to kill him .



Why did she break his neck ?