The awkward future-in-law dinner at Susan's is finally over, and Ian and Susan are fixing coffee in the kitchen. They're talking about Daddy Hainsworth, who we learn is upstairs "lying down," as is his post-dinner habit. Ian remarks that things are going "very well," which of course sets the stage for Susan's next disaster: carrying the coffee on a tray, she butt-firsts into the dining room, and the door slams into Ian's mother, who falls to the floor, spilling red wine all down her front in the process.
Susan races upstairs to get Lynn Redgrave a towel, only to discover Daddy Hainsworth wearing Susan's robe, bra, and underwear, and gazing at himself fondly in her bedroom mirror. Is that what "lying down" means in the UK? Because that could lead to a lot of uncomfortable misunderstandings, much like the internationally treacherous "fanny pack." Daddy tries to pretend he's just trying to "get a sense of the drape," you know, research for when he buys a robe for his wife. (Paxton Whitehead, the actor playing Daddy Hainsworth here, is really kind of fantabulous in this scene.) But as Susan points out, that doesn't really explain why he's wearing her underwear. Daddy gets her to promise not to tell his family about this, and she invites him to consider everything he has under the robe a gift. No, really. Take it.
Downstairs, Lynn Redgrave is already hard at work trying to convince Ian to ask Susan to sign a pre-nuptial agreement, based on Susan's financial woes (that comment about the wobbly chair, and the lack of funds needed to replace it, did not fall on deaf ears) and Susan's vindictive streak (the comment about Karl's assets wasn't missed, either). Ian balks, but his mother explains that if something dire should happen to Ian's marriage, she doesn't want to lose the "family estate" back in England, which they've owned for "generations." I actually don't think that's too terribly unreasonable a request, especially since the only thing Lynn Redgrave wants Susan to sign away is Ian's inheritance from his family, not his entire fortune... at least I think Ian's wealthy in his own right? Ian continues to protest, and Susan returns, overhearing some of the argument. At Susan's insistence, Lynn Redgrave explains what she's asking for, and Susan gets all wounded. Ian puts his foot down, and Lynn Redgrave snoots that she'll leave the family fortune to Ian's brother, then. Ian: "You think Nigel's going to give you a grandson? He's an alcoholic homosexual!" Lynn Redgrave: "With a castle at stake, he can learn a new skill." Zing! Daddy Hainsworth returns just as Lynn Redgrave is telling Susan not to be offended -- every woman goes into marriage thinking things are going to be perfection, but then she, say, stumbles across a bill for "expensive lingerie" in someone else's size, located in her husband's pocket. Susan and Daddy exchange a look.