Compared to his younger brother, Lu Tianjun was smarter and more worldly. He was turning thirteen after his birthday, and in the old times, that was no longer considered a child's age. Added to this, he was the oldest grandson who was destined to bear greater responsibilities. Therefore, for the past half a year, Father Lu had been meticulously explaining to him most of the household affairs, educating him to understand the outside world and not be confounded by external opinions.
Father Lu had initially not told Tianjun about Wang Jiao's covetousness for Lu Jiang, since it was admittedly ignominious. Coincidentally, however, Tianjun came home on the day of Wang Jiao's visit and heard everything from behind the ox shed.
So, Father Lu told him about it, including his assessment of Wang Jiao.
She was unprincipled and unscrupulous, with a severely deficient character.