In truth, they couldn't completely blame their daughter.
After all, given Su Chaoyang's character and behavior, the situation was already suspicious.
In the end, they favored their own child deep down, vehemently defending their daughter, ignoring the irrationality of the situation. They didn't explore the true cause and effect, nor did they have a proper conversation with Su Chaoyang, or give him a chance to explain. They simply decided on his "guilt".
If they had to identify who was more at fault, Mu Chenggong felt it was himself.
Seeing the orphan of his comrade endure such unfair treatment, unable to express his suffering, and having quit school to join the army and not returning for four years, the remorse in his heart was like a tsunami overwhelming him.
He had let down Su Chaoyang and his deceased comrade.
