Bellatrix was sitting in her cell cackling crazily, but suddenly she stopped, when she felt the Black family magics rip themselves from her. She was furious and screamed that her blood traitor of a cousin Sirius would pay for what he had done to her, but later she stopped, when she was calmed down by the presence of the dementors. She didn’t know that Sirius was no longer lord Black because of the replacement bond, but she was in Azkaban for so long that she didn’t even know, what was happening outside.