After being jilted by the saintess at the beginning, why is she crying?

[No system + multiple female leads]
Transmigrating to the world of cultivation, Lin Fengmian became the Daoist partner of a saintess; even those with five spiritual roots were stunned.
Fortunately, he possesses a pure yang holy body, and he becomes stronger by cultivating with others!
When the saintess abandoned him, he retaliated by siding with her mortal enemy.
Why did the saintess start crying and begging for forgiveness after learning the truth?