What role does Pear Blossom play in Wang Lung's life? Give examples from the novel

Pear Blossom is a slave bought by Wang Lung and given to Lotus. Frail, delicate and beautiful, Pear Blossom is afraid of all men with the exception of Wang Lung. She becomes his second concubine by the end of the novel, and is with Wang Lung till the end of his days.