"Your grandfather never heard your great-grandfather speak of the specific details." Lucius tapped his fingers lightly on the table, and a House Elf immediately stepped forward to refill his tea. "Part of it was due to the Goblins' involvement, so the Malfoy family promised to avoid mentioning Cassandra whenever possible."
"Does the Malfoy family actually fear those Goblins?" Draco looked at his father in disbelief.
"No, Little Dragon." Lucius's voice was gentle. "If the Goblins had not shown sufficient sincerity, why would the Malfoy family have agreed to such a request? Besides, your grandfather once told me that the Malfoy family only agreed to the Goblins' request because it suited them. The real reason was that Cassandra stole Merlin's Treasure, an heirloom passed down through the family. In his fury, your great-great-grandfather struck her name from the Malfoy family tree."
"Why?" Draco asked in confusion. "Why would she do that? And where is she now?"
"No one knows. I only heard that during that time, she was always distracted, muttering Potter's name every day... After that, she disappeared." Lucius raised his teacup. "However, your great-grandfather left behind a final wish before he died: if we ever found Cassandra, we were to bring her back into the Malfoy family... Ha, how could that be possible? So many years have passed. She may already be dead."
"Perhaps she's still alive? Otherwise, why would great-grandfather have said that?" Draco asked hesitantly. He had the feeling that Cassandra was still somewhere in this world.
"That was because Cassandra was his most beloved little sister," Lucius said. "People can never truly accept the departure of their loved ones."
Draco nodded in understanding.
"Tell me about your classmates." Lucius asked as if casually. "No need to mention the Slytherins. Tell me about Potter—the child who defeated