我爱你妈的闺女我爱你爸的儿子
[wŏ ài nĭ mā de guī nǚ wŏ ài nĭ bà de ér zi]
Translated as 'I love your mom’s daughter (sister), I love your dad's son (brother)', it indicates unconditional or inclusive family love, sometimes expressing strong emotions toward close relatives in an intimate manner but may sound unconventional to Westerners.