The more defensive Su Mother became, the more suspicious she appeared. Even Su Yijia, who had no professional training, could see through her. With those professionally trained individuals present, it was impossible to hide the discomfort.
Su Yijia wasn't concerned about Su Mother's answer at all. She merely wanted to raise doubts about her identity in front of these people openly. She hoped to provide them with more clues regarding her background. In their efforts to investigate her identity, they would naturally delve into her birth records. If there was any issue, they would inform her.
If they found any other biological parents, she wouldn't need to search for them herself. These investigators were efficient, and they would do a thorough background check. As the saying goes, when free wool is available, it's best to take full advantage of it.