Tempting Boss Summary: A Steamy Billionaire Boss Romance

Last Updated: October 9, 2026

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Table of Contents

Introduction

A travel coordinator interrupts a billionaire mid-sentence, hangs up his call, and saves a hundred-million-dollar deal in under an hour.

That is how Deena Brand meets Callum Frost in Tempting Boss, the eighth book in Lilian Monroe’s Manhattan Billionaires series.

She runs her own struggling business and refuses to answer to anyone. He runs Frost Venture Capital and refuses to let anything slip out of his hands.

Their clash moves from boardroom standoffs to late-night phone calls, a fake boyfriend performance at a Southern country club, and a contract neither of them can treat as purely professional.

What follows is a workplace romance built on two stubborn people, one accidental email, and a pregnancy that forces both to confront what control actually costs them.

Who Will Enjoy This Book

Readers of billionaire and workplace romance who want sharp verbal sparring rather than instant attraction.
Fans of the surprise pregnancy trope where the reveal lands mid-relationship instead of at the start.
Readers who prefer dual points of view that alternate between both leads.
Those following the Manhattan Billionaires series and its interconnected corporate settings.

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TL;DR: The Quick Brief

Deena Brand builds a freelance corporate travel business to escape debt and a controlling Southern family. Callum Frost is a billionaire micromanager whose executive assistant quits mid-crisis, putting Deena in his orbit.

What drives the plot: a high-paying six-month contract, an accidental company-wide email confession, and an unplanned pregnancy.
Central tension: his need for total control against her refusal to be managed by any man.
Emotional core: Callum’s childhood guilt over his sister’s death, and Deena’s fight to keep her independence inside a relationship with someone far wealthier.
Ending note: reconciliation, a hospital birth, and a seven-years-later epilogue with three children.

Tempting Boss Summary Workplace Romance (2)

Book Details at a Glance

Genre & Subgenre: Contemporary Romance; Billionaire Workplace Romance with a Surprise Baby plotline.
Core Narrative Tropes: Enemies-to-Lovers, Workplace Romance, Grumpy Alpha Boss and Defiant Heroine, Surprise Pregnancy, Forced Proximity.
Tone & Atmosphere: High-energy, witty, emotionally intense, and steamy.
Primary Conflict: Callum’s need for total control against Deena’s demand for professional and personal independence.
Pacing Style: Fast-paced and character-driven, told in alternating dual first-person points of view.
ISBN: 978-1923187641 (ISBN-10: 1923187643).
Pages: 332.
Book Structure: 39 chapters plus an epilogue, with perspectives alternating between Deena and Callum.

Tempting Boss Summary (Spoilers Ahead)

Spoiler warning: the following section covers the full plot, including the ending.

Deena Brand runs an independent corporate travel coordination business from a cramped New York studio apartment. She built it to escape a repressive upbringing in Charlotte, North Carolina, and to pay down student loans and credit card debt.

Her reputation for last-minute fixes brings her into Frost Venture Capital, where CEO Callum Frost is berating staff over a failed flight booking. Associate Jack Reed needs to reach Mexico City from Bangkok to close a hundred-million-dollar deal.

Deena takes the phone, ends Callum’s call without asking, and charters a private route through Singapore and Los Angeles. The deal is saved. Callum is furious at losing control of the room and equally transfixed by her.

Weeks later he calls her late at night for a Tokyo flight, and the conversation turns into charged verbal sparring. In February he offers her a full-time executive assistant role with a blank-check salary, and she refuses outright.

Her answer is blunt: she works for no one but herself.

In March, Deena is on a bad date with a self-absorbed podcaster when Callum calls again. She leaves the date to talk. He mentions that his sister Erica is fighting breast cancer, and the call shifts into raw flirtation that ends in an intimate phone encounter.

Panicked by how easily he gets past her defenses, Deena blocks his number the next morning.

She then travels to Charlotte for her parents’ thirty-fifth wedding anniversary at a country club. Her mother Maryanne criticizes her appearance and pushes her toward her high-school ex, Austin.

Overwhelmed, Deena unblocks Callum and sends a snarky text. Maryanne grabs the phone, speaks to him, and assumes he is Deena’s billionaire boyfriend.

Callum arrives at the party in a tailored tuxedo and plays the devoted partner convincingly. He deflects the local gossips and rescues Deena from Austin, then corners her in the club’s billiard room, where an argument turns physical.

Afterward, Deena tries to restore professional boundaries. She agrees to a non-exclusive six-month contract as his travel director for three hundred thousand dollars, half paid upfront and non-refundable, on the condition that they never touch again.

At Frost Venture Capital, she overhauls company travel procedures and asserts her own authority. Callum buys her a high-end laptop as a sign-on gift after hers keeps crashing.

When Erica and her five-year-old daughter Lila visit the office, Callum pulls his MBA diploma off the wall to frame Lila’s crayon drawing. The gesture shifts how Deena reads him.

He also orders gourmet lunches delivered to her desk daily. One evening, while trying to message her best friend Alba, Deena accidentally sends a company-wide email reading, “I have a crush on my boss.”

She prepares to resign. Instead, Callum locks her office door and confesses that he is in love with her mind, heart, and soul. They give in to their feelings there.

That night at his Tribeca penthouse, Callum tells her the source of his need for control. At six years old, he was supervising his four-year-old sister Gracie when she drowned in a neighbor’s pool, and his mother blamed him.

Deena stays. They disclose the relationship to HR, and she moves into his penthouse.

In late June, a routine doctor visit for birth control reveals she is pregnant, conceived during the March anniversary weekend. She delays telling him while he is on a multi-city European trip.

On his return he gives her a Schiaparelli dress and takes her to dinner, where she tells him. He is overjoyed, but his protectiveness soon becomes suffocating.

He polices her diet, mandates workouts, and demands she stop working. Deena resists, feeling her independence and professional identity being erased.

The break comes when she lands a major contract with a medical device company. Callum finds her working late, closes her laptop, tells her to shut the business down, and dismisses her career by pointing out he earns a hundred times her salary.

The next morning, Deena quietly packs and returns to her studio apartment. Callum is devastated and yells outside her building, smashing his fist into the brick wall.

During the separation, Callum enters therapy for his control issues, and Erica’s cancer goes into full remission. Erica confronts him with the idea that love requires respecting Deena’s autonomy.

Deena reconnects with her brother Brooks and rebuilds a healthier relationship with her family on her own terms.

At thirty-four weeks pregnant, a routine checkup reveals severe, rapid-onset pre-eclampsia, requiring emergency labor induction. In the middle of contractions, Deena recognizes that her fight for independence had hardened into its own kind of isolation.

She calls Callum, and he rushes to the hospital. He stays beside her without issuing orders to the staff. She tells him she loves him and states that she is keeping her business, and he agrees without argument.

She gives birth to their son, Luke. Nearly seven years later, Callum and Deena are married, Deena runs the premier corporate travel agency in Manhattan with Callum as an investor, and they have three children: Luke, Gracie, and baby Bella.

Characters In This Book

Character	Role
Deena Brand	Freelance corporate travel coordinator who builds her own business to escape debt and a controlling Southern family.
Callum “Cal” Frost	Billionaire founder of Frost Venture Capital and Deena’s employer and love interest.
Erica Frost	Callum’s sister, who is fighting breast cancer and lives with him along with her daughter.
Lila Frost	Callum’s five-year-old niece, Erica’s daughter.
Maryanne Brand	Deena’s mother in Charlotte, who judges her appearance and relationship status.
Beau Brand	Deena’s father, a traditional Southern patriarch.
Brooks Brand	Deena’s older brother, who later reconciles with her.
Stacey Brand	Brooks’s wife and Deena’s sister-in-law.
Austin	Deena’s high-school ex-boyfriend, a criminal defense attorney in Charlotte.
Alba	Deena’s best friend in New York and an image consultant.
Miranda	Callum’s former executive assistant, who quits in the opening chapter.
Jack Reed	Frost Venture Capital associate whose travel crisis Deena resolves in the first chapter.
Willa	Receptionist at Frost Venture Capital.
Xavier	Callum’s private chef at his Tribeca penthouse.
Luke, Gracie, and Bella Frost	Callum and Deena’s three children, shown in the epilogue.

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Books Like Tempting Boss

Big Bossy Mistake by Lilian Monroe — Book 1 of the Manhattan Billionaires series, sharing the high-stakes office setting, witty banter, and surprise romance structure.
Forbidden Boss by Lilian Monroe — Book 5 of the same series, built on corporate power imbalances and a boss-employee attraction.
Knocked Up by the CEO by Lilian Monroe — An unexpected pregnancy storyline with an overprotective hero navigating fatherhood.
The Hating Game by Sally Thorne — Workplace rivals who trade sharp insults before the tension turns romantic.
Beautiful Bastard by Christina Lauren — An office-set enemies-to-lovers romance with a demanding male lead and a defiant counterpart.
Wait for It by Mariana Zapata — A slow-burn romance featuring an independent heroine who guards her autonomy closely.