当着你与你爱人说我爱你
[dāng zhe nĭ yŭ nĭ ài rén shuō wŏ ài nĭ]
Literally means 'I say I love you in front of you and your lover.' It expresses a complex romantic sentiment. There could be several layers of meaning: unafraid confession, challenging declaration, heart-breaking confession and so on. In short, it indicates some emotional complexity and possibly drama.