。
She talked back to me.
Literal
She [topic-は] me [to-に] backtalk-did.
口答え (くちごたえ) literally 'mouth-reply' — the noun for talking back, sassing, or replying defiantly to someone in authority. The compound combines 口 ('mouth') + 答え ('reply'). Almost always used negatively — about subordinates, children, or junior staff replying inappropriately. 口答えする is the verb form. Common in scolding contexts: 親に口答えするな ('don't talk back to your parents').