我们的爱三姑六婆都知道我们的情四叔七舅都晓得
[wŏ men de ài sān gū liù pó dōu zhī dào wŏ men de qíng sì shū qī jiù dōu xiăo dé]
This long and vivid saying illustrates a love story known by everyone in extended family, signifying an open relationship or affair known widely among acquaintances.