Just after the wedding, the protagonist's wife dies of a stomach ailment, and the protagonist decides to apprentice his next son to the merchant and betrothes his youngest daughter to the merchant's son.  
After the protagonist of this work realizes that his son is sleeping with his mistress, he arranges to have the boy marry the daughter of a grain merchant.  Just after the wedding, the protagonist's wife dies of a stomach ailment, and the protagonist decides to apprentice his next son to the merchant and betrothes his youngest daughter to the merchant's son.  After the protagonist takes care of those sons, Nung En and Nung Wen, his uncle's family moves in with him and causes him trouble, since his uncle turns out to be a member of the gang of thiefs.  Also featuring a slave named Pear Blossom and a concubine named Lotus Blossom, FTP, name this 1931 novel about the peasant couple O-Lan and Wang Lung, a work set in China and written by Pearl Buck.
After the protagonist of this work realizes that his son is sleeping with his mistress, he arranges to have the boy marry the daughter of a grain merchant.  
The Good Earth