Mo Yan and the others, who were having a nap at home, had no idea about everything happening under the ancient poplar tree until a woman who had helped Mo Wu's mother and daughter knocked on the courtyard gate of the Mo family, asking to borrow a carriage to take the mother and daughter into the city to see a doctor. That's when they learned of such a major incident.
Upon hearing the news, Mo Yan and the others were furious. Learning that Old Man Mo, Mrs. Hong, and others were absolutely unwilling to pay silver to summon a doctor for Mo Wu's mother and daughter made them even more outraged. They wished they could rush to Lao Mo's house immediately to bring the mother and daughter back home and let those with black hearts be drowned in the spit of the villagers.
Getting a doctor was urgent, so Mo Yan personally drove the carriage to fetch the doctor, without taking the time to ponder why Mo Wu had not informed her of the plan in advance.