The couple had business dealings with the Lawson family. Clarice listened to their conversation with her father and learned that they wanted to adopt a child. After that, Clarice privately found the woman in the couple and told her about Herbert.
This was how she described Herbert to the woman. "He's the kindest child in the world, but he has a demon father. Madam, if you want a child, I suggest you visit him. He's very sensible. You'll like him."
Clarice only mentioned Herbert to Madam but did not tell her his name or appearance.
Later on, the couple really went to the orphanage. When the madam arrived, she immediately took a fancy to a silent and sensible child. Later on, the madam called Clarice and said that she had already chosen the child she liked. She even sent Clarice a photo.
Clarice smiled knowingly after looking at the photo.
She did not tell the lady that the child she brought back was the child she was talking about.