Bellatrix LeStrange handed 2 year old Circe to Lucius Malfoy.
"You know what to do if something happens." she said with a high-pitched giggle. Lucius nodded as Bellatrix apparated.
*A few hours later*
"Circe." Lucius drawled.
"Yes?" she said with a fearful glance up.
"Your mother has been taken. She's in Azkaban now." Circe nodded fearfully.
"You will live with me now."