Song Jianguo betrayed Tang Xiaoxue twice. When were those two times?

The first time I betrayed Tang Xiaoxue was in Chapter 37 of the novel, and the second time I betrayed Tang Xiaoxue was in Chapter 40 of the novel. Song Jianguo is a character in the novel Yu Hua: Everything About My Mother by Rao Xueman, a China writer. He betrayed his girlfriend Tang Xiaoxue twice. His first betrayal of Tang Xiaoxue was in the 37th chapter of the novel. At that time, Song Jianguo told Tang Xiaoxue's cousin about her career and sex life, and got a reward of 2,000 yuan. The second betrayal of Tang Xiaoxue was in the 40th chapter of the novel. At that time, Song Jianguo sold Tang Xiaoxue's privacy and photos to a fan brother in Lan Jieying and made a lot of money. These two betrayals made Tang Xiaoxue very painful and dissatisfied, which eventually led to the breakdown of their feelings.