Frustrated just barely touched on what she was feeling. She wanted to do to Lucius was she did with the imbecile filth she toyed with down in her dungeon. He wasn't even good enough for the cruciatus. She just wanted him gone. Although she had taken the first step to get rid of him. Bellatrix convinced Narcissa to do what she had wanted her baby sister to do for ages now. Well, nearly convinced. She was just waiting for the weight of it all to sink in for Narcissa. Then she could be free of Lucius.
Bella settled herself back down against Rodolphus. The idea of her sister being in trouble always made Bella's blood pressure rise. She took in a shallow breath and calmed herself.