Is 'Borrow Romancing Mister Bridgerton' A Fanfiction?

Mia's life turns around when she eavesdrops on a billionaire conversation and dents his expensive car. Allen makes Mia his substitute bride when he finds out his fiance has been cheating on him as a payment for denting his car.  Mia turns from a girl with debts to a billionaire's wife in just a day. After she signs a contract to be the billionaire's wife for a year,  she is determined to stay until the end just because of the payment she will receive. Will she be able to abide by the rules of the contract? Will she be able to stay with him for a year even though his ex keeps trying to break them apart? 

He called me a liar. A gold-digger. Then he left me pregnant, humiliated, and broken. Five years later, I built a life he was never supposed to touch again. A daughter. A thriving wedding business. A version of me that doesn’t beg. But fate has a cruel sense of humor. Because the next wedding I’m hired to plan? His. He doesn’t remember me. Not the nights. Not the promises. Not the baby he never met. And when his perfect little bride ends up in a coma days before the ceremony? Nicholas De Castello....cold, ruthless, and still disgustingly beautiful....makes me an offer I can’t afford to refuse... “Pretend to be my wife. Or I’ll destroy everything you’ve built.” Now I’m trapped in his world again. In his house. In his lies. With the man who broke me once... …and the daughter he doesn’t know is his sleeping in the next room.  

Title: Tempted by the Billionaire's Bride After a series of unfortunate events, the heroine, Emily, finds herself in dire financial straits. With no other options in sight, she signs up for a mail-order bride service, hoping to find a wealthy husband who can save her from her crippling debt. Little did she know that her intended groom, billionaire businessman, Alexander Pierce, was not looking for love, but a wife in name only. Despite his initial disdain for the arrangement, Alex finds himself drawn to Emily's sweet and timid nature. He offers to pay off her debts in exchange for a predetermined amount of time as his temporary wife. Emily, desperate for a way out, agrees to the terms, but can she really handle the cold and distant Billionaire who has control over her life? As they navigate their fake marriage, Emily starts seeing the softer side of Alex - the vulnerable man who has been hurt before. His guarded exterior starts to melt as he discovers how much he enjoys having Emily around. But just as they begin to develop feelings for each other, a dangerous figure from Alex's past resurfaces, throwing their newfound happiness into jeopardy. With secrets and lies threatening to tear them apart, can Alex and Emily overcome their differences and find true love? Or will their relationship be nothing more than a business arrangement?

Violet Wintour is a controversial heiress in the 21st-century high society, but not for the same reasons other rich kids of London are. Her father, the Duke of Averbury, passed away with a family will that leads to a surprising twist. Across the world, Clare Leighton is living a modest life. Years of struggling with bankruptcy begin to take a toll on her family. Her caring yet depressed parents force her to take a different path that she hasn't prepared for. When the hand of fate brings these two different women together, something is going to change forever.

On what was supposed to be the happiest day of her sister’s life, Aria Monroe is forced into a nightmare she never saw coming. The bride is gone. The guests are waiting. And her family gives her only one choice— take her sister’s place… or destroy them all. Left with no escape, Aria walks down the aisle and marries Adrian Blackwood, a dangerously powerful billionaire known for his cold heart and ruthless reputation. But secrets don’t stay hidden forever. When Adrian discovers he’s been deceived, Aria expects anger… divorce… punishment. Instead, he gives her something far worse. > “You wanted to be my wife so badly? Then stay. And suffer the consequences.” Trapped in a marriage built on lies, Aria refuses to break under his control. But the more she resists, the more Adrian becomes obsessed with the woman who was never meant to be his bride. Just when their dangerous connection begins to blur the lines between hatred and desire… the real bride returns. And she wants her place back. But Aria is no longer the weak substitute. And this time— she’s not leaving without a fight.

Elena Rosewood agreed to marry Edward Ashford to save her family from ruin. For two long years, she endured a cold, loveless marriage and the constant scorn of the Ashford family—all for a love she was carrying alone. But everything changed the night Edward gave her a devastating ultimatum. Divorce him… or sleep with another man to give him an heir. With her mother’s medical expenses entirely funded by the Ashfords, Elena has no choice but to agree. Yet what was supposed to be her final sacrifice becomes the beginning of an even greater downfall… when the man Edward sends to her bed turns out to be Cedric Ashford—his own adopted younger brother.