Damsel in Distress - S1.E8

Eileen is doing business with Lucard; in fact, she's going to have dinner with him at the castle. Gustav and the kids learn of the dinner, but Gustav himself is vampirized by one of Lucard's assistants, and the kids are left on their own to rescue Eileen. They release Gustav, but find that Lucard has already turned their mother into a vampire. Lucard orders her to bite Max, but her love for her son overpowers his control over her.