Curiosity quickly morphs into growing horror, the puzzle pieces of Regulus" final days falling into place the longer Kreacher speaks. Draco considers occluding to tamp down the rising bile when he learns that his mother had a hand in Sirius’ death. He doesn’t question why it was easier to swallow when it was all Bellatrix. His father is already a lost cause, but he never imagined his mother with the blood of her kin on her hands.