Chapter Twenty Summary and Analysis
⚠️ Spoiler Warning: This guide contains detailed spoilers for the entire novel. Proceed only if you've finished reading or are comfortable knowing the plot.
Summary
The chapter opens with Lucas wrestling with a new and overwhelming emotion: jealousy. After an encounter at a café, Lucas finds himself experiencing a possessive, almost primal reaction. He reflects on how different this jealousy is from anything he's felt before—it's intense, consuming, and makes him want to claim Rosie as his own. He also recalls the moments from the Halloween party in the stall, which have been occupying his thoughts. He admits to himself that he's been finding excuses to touch her—checking her hair, brushing against her clothes—and that he feels unworthy of her, noting that she deserves men in tuxedos while he doesn't even own a button-down shirt.
As they walk home from the subway, Rosie tells Lucas she's been thinking about the experiment. She explains that since her writing is going well and she feels more in control, she's wondering if the experiment still makes sense. She mentions feeling awkward at the coffee shop. Lucas asks directly if she wants to date Aiden, and Rosie clarifies that she doesn't want Aiden specifically, but she might want real dates—the real thing.
Lucas is stung by this, feeling he can't offer her that since he's leaving. They argue about the date count: Rosie counts the masquerade as one of their experimental dates, while Lucas insists they've only been on two. Rosie quotes phase three of their experiment—infatuation, intimacy, seduction—and explains that what happened at the Halloween party counts as seduction. She admits she'd never been properly seduced before, which affects Lucas deeply.
Lucas stops and tells Rosie that if they weren't friends, he would take her somewhere dark and tear her clothes off with his teeth. He tells her to count the Halloween party as an experimental date if she wants, but reminds her they agreed on four dates. He reveals he's planned a fourth date for Thursday. Rosie agrees to keep her schedule open.
As they approach the apartment, Rosie says she hopes this makes him happy. They find the door wide open, and Taco—Lucas's Belgian shepherd—comes barreling out, knocking Lucas to the floor. Charo, Lucas's sister, is there with Lina and Aaron. Charo explains that Rosie arranged everything: she did the research to fly Taco in the cabin, handled the paperwork, and paid for Taco's ticket. It was Rosie's idea for Charo and Taco to come to the States.
Rosie blushes at the revelation. Charo tells Rosie she's family now. Lucas is overwhelmed by the gesture, realizing no one has ever done something so thoughtful for him. Rosie asks if she can pet Taco, and Lucas tells her Taco will love her. Taco immediately pounces on Rosie, covering her face with kisses, and Rosie laughs joyfully. Lucas watches and realizes he's jealous of his own dog for being in Rosie's arms.
Key Events
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Lucas experiences intense jealousy after the café encounter, reflecting on his possessive feelings toward Rosie
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Rosie tells Lucas she's been reconsidering the experiment, citing awkwardness at the coffee shop
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Rosie clarifies she doesn't want to date Aiden but might want real dates
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They debate the date count—Rosie counts the masquerade, Lucas insists on two—and settle on three
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Lucas reveals he's planned a fourth date for Thursday; Rosie agrees
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They arrive home to find the apartment door open and Taco running out to greet Lucas
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Charo, Lina, and Aaron are inside; Charo reveals Rosie arranged Taco's flight
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Rosie blushes as Charo explains Rosie did the research, paperwork, and paid for the ticket
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Charo tells Rosie she's family
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Taco pounces on Rosie, covering her with kisses; Lucas feels jealous of his dog
Character Development
Lucas — This chapter marks a significant shift in Lucas's self-awareness. His jealousy is described as something new and intense, different from past reactions. He recognizes his own possessiveness and questions his right to feel it, given that he's leaving and doesn't feel he can offer Rosie what she deserves. His admission that he's been finding excuses to touch her shows how much his feelings have grown beyond the experiment's framework. The arrival of Taco and Charo reveals a more vulnerable side of Lucas—his emotional reaction to seeing his dog is genuine and moving. His gratitude toward Rosie for arranging Taco's arrival is profound; he notes that no one has ever done something so thoughtful for him.
Rosie — Rosie's decision to reconsider the experiment shows her growing confidence in her writing and her life. Her honesty about wanting real dates—while explicitly ruling out Aiden—suggests she's becoming clearer about what she wants. Her blush when Charo reveals Rosie's role in bringing Taco shows her humility; she didn't want credit for the gesture. Her quiet comment that she wants Taco to like her reveals how much she cares about Lucas and his world.
Themes, Symbols, or Motifs
Jealousy and possessiveness — Lucas's jealousy is the chapter's central emotional thread. It's not just about Aiden; it extends even to his own dog when Taco covers Rosie with kisses. This jealousy signals how far Lucas has fallen for Rosie, beyond the bounds of their experiment.
Real vs. experimental — The chapter repeatedly blurs the line between what's real and what's experimental. Rosie's desire for real dates, Lucas's insistence on counting the masquerade, and the fact that neither calls the fourth date experimental all point to the experiment becoming something genuine.
Family and belonging — Charo's declaration that Rosie is family is a significant moment. Rosie, who has been navigating her own family dynamics, is welcomed into Lucas's family circle. The surprise reunion with Taco and Charo reinforces the theme of chosen family.
Thoughtful gestures — Rosie's behind-the-scenes work to bring Taco to Lucas is a major act of care. It's not flashy or romantic in a conventional sense, but it's deeply personal and designed specifically to make Lucas happy.
Why This Chapter Matters
This chapter is a turning point in the novel. It solidifies Lucas's romantic feelings for Rosie—his jealousy makes it undeniable, even to himself. It also demonstrates Rosie's investment in Lucas's happiness through the Taco surprise, showing that her feelings run deeper than the experiment. The chapter also advances the plot by confirming a fourth date, which neither character labels as experimental, suggesting the relationship is moving beyond its original framework. The introduction of Charo and Taco expands Lucas's world and gives Rosie a place within his family.
Study Questions and Answers
1. Why does Lucas react so strongly to Rosie's suggestion that she might want real dates?
Lucas's reaction is rooted in his belief that he can't offer Rosie what she deserves. He's leaving, he doesn't have the material trappings he thinks she deserves (he mentions not owning a tuxedo), and he feels unworthy of her. His jealousy at the café and his possessive thoughts reveal that his feelings for Rosie have grown far beyond the experiment, but he doesn't believe he has the right to act on them or claim her.
2. What does Rosie's arrangement to bring Taco to New York reveal about her feelings for Lucas?
Rosie's gesture is deeply thoughtful and personal. She did the research, handled the paperwork, and paid for Taco's ticket—all without telling Lucas. This isn't a grand romantic gesture; it's a practical, caring act designed to bring Lucas happiness. It shows she's been paying attention to what matters to him and that she wants to be part of his life in a meaningful way. Her quiet comment that she wants Taco to like her further reveals her investment in Lucas's world.
3. How does the chapter blur the line between the experimental and the real in Lucas and Rosie's relationship?
The chapter repeatedly complicates the experiment's boundaries. Rosie counts the masquerade as a date, citing phase three (infatuation, intimacy, seduction) as evidence. Lucas initially resists but eventually tells her to count it if she wants. Neither character calls the fourth date experimental. Rosie's desire for real dates and Lucas's jealousy both suggest their feelings have moved beyond the experiment's framework, even as they continue to use its language.
Navigation
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Previous Chapter: Chapter Nineteen