刘哥哥你是我的夫呀白九妹你是我的妻啊
[liú gē gē nĭ shì wŏ de fū yā bái jiŭ mèi nĭ shì wŏ de qī a]
It means “Elder Brother Liu, you are my husband, Sister Bai Jiu, you are my wife”. It seems whimsical and nonsensical but could be taken as expressing a fantasy of being the center of two characters in a fictional narrative or roleplay.