"Thank you" is used not only between friends, but also between parents and children, brother and sisters, husbands and wives.
“谢谢”不仅仅用在朋友中，而且是用在父母孩子、兄弟姐妹、丈夫妻子中的。
2
The mother-of-one, who sleeps each night with a different brother, does not know which of her five related husbands is the father of her 18-month-old son.