Although the new "brother" could not compare to a legitimate direct heir, being registered under the name of the first wife, he was considered her son. Since he was older than Wang Youbao, his status was much higher than Wang Youbao, the son of a concubine.
However, this Madam was truly astute, not only adopting a son older than Wang Youbao but also ensuring that the son was from the same clan as Youbao. If he were not from the same clan, even if Landlord Wang agreed, those uncles in the Wang Family would definitely not have consented.
After all, compared to someone from another clan, Youbao's blood was of the Wang Family lineage.