Acts 3, 4 and 5 are all set in the home of Lady Wishfort. We are introduced to Lady Wishfort who is encouraged by Foible to marry the supposed Sir Rowland – Mirabell's supposed uncle – so that Mirabell will lose his inheritance. Sir Rowland is, however, Waitwell in disguise, and the plan is to entangle Lady Wishfort in a marriage which cannot go ahead, because it would be bigamy, not to mention a social disgrace (Waitwell is only a serving man, Lady Wishfort an aristocrat). Mirabell will offer to help her out of the embarrassing situation if she consents to his marriage. Later, Mrs. Fainall discusses this plan with Foible, but this is overheard by Mrs. Marwood. She later tells the plan to Fainall, who decides that he will take his wife's money and go away with Mrs. Marwood.