Meanwhile, Horatia meets and befriends Lord Lethbridge, who seeks revenge on the Earl for his role in thwarting Lethbridge's attempts to elope with Lady Louisa (Rule's sister) several years earlier. Lethbridge gains Horatia's favour by staging a hold-up of Horatia's carriage, where he heroically rides up to save her from the highwaymen. The Earl warns Horatia against continuing her friendship with Lethbridge; but when he declines to explain why, Horatia disregards his warning. Horatia, who wants to teach her husband a lesson, goes to a masked ball that the Earl had forbidden her from attending, with Lord Lethbridge as her escort. Having heard that Lethbridge is an excellent card player, she attempts to coerce Lethbridge into playing with her and he eventually relents, proposing that they play for a lock of her hair. Before the game can start, Lord Rule (who has followed Horatia disguised in a domino and mask) steps on Horatia's gown, ripping it. While she is away fixing her dress, he incapacitates Lethbridge and dresses himself in Lethbridge's mask and domino. When Horatia returns she doesn't realise her husband has taken Lethbridge's place and they begin to play cards. Horatia is badly beaten and during the game begins to realise the inappropriateness of her actions. When she gives up the lock of her hair, Rule (masquerading as Lethbridge) steals a kiss. Horatia, furious and indignant, rushes out and bumps into Lady Massey, who happens to be at the same ball. The next day Horatia confesses what happened to Rule because she can't bear for him to hear it from Lady Massey. The Earl explains his ruse and Horatia decides to end her friendship with Lethbridge.