我爱你妈的女儿我爱你爸的儿子
[wŏ ài nĭ mā de nǚ ér wŏ ài nĭ bà de ér zi]
Translating directly into English sounds quite awkward, it expresses 'Love you mum's daughter, Love you dad's son.' A unique and intimate way to declare undying familial affection and unity across the whole family. It is an expression of pure unconditional family love between siblings and parents.