Original sentence: Sun's mother was so proud of her son that she displayed a large picture of Sun in uniform at their home and after learning her son's defection, she was so devastated that she fell ill and never recovered, finally died due to the illness, and Sun's family members put the blame on Sun
Edited sentence: Sun's mother was so proud of her son that she displayed a large picture of Sun in uniform at their home and after learning her son's defection, she was so devastated that she fell ill and never recovered, finally passed away due to the illness, and Sun's family members put the blame on Sun