= I know what you are trying to hide from me.
You guys are dating, aren't you? I'm onto you.
You are having an affair with her, aren't you? I'm onto you.
You are having a crush on him, aren't you? I'm onto you.
あなたが隠してること、私、知ってるから。
exfoliate 角質を取る
美容でよくお目にかかる語ですねえ。