How Does 'I Sleep My Sister Fiance' Impact The Story?

On the night of my sister’s engagement party, my life officially crashes. Again. All because of one name on the invitation. Zachary de Sanctis. My sister’s fiancé. Fiona. My ex, the guy I punched in the face five years ago. Heir to the richest old-money family in Europe. And one tiny detail only God and I know: he’s the father of my twins. For the past five years, I’ve been hiding out in a little town in Oregon, working as the CEO of a IT firm while chasing two four-year-olds who look more like their father than me. Isaac and Isabella: two mini De Sanctis clones with the last name Gómez, razor-sharp mouths, brains that run too fast, and a talent for causing trouble exactly when I need peace. My family knows I came home pregnant and alone. They just never asked who the father is, and I never offered an answer. As far as they’re concerned, I’m still Arabella Gómez, the wild one who lost her way. I thought going to Fiona’s engagement party would just mean a few hours of fake laughing, then a quiet drive back to my glass-walled house in Oregon and two sets of blue eyes calling me Mommy. Until Zach walks into my parents’ living room holding Fiona’s hand… and his gaze stays on my face a little too long. He can’t find out about Isaac and Isabella. Fiona can’t find out her perfect fiancé was mine first. And my family can’t know what really happened five years ago. Hiding a scandal between two rich dynasties is one thing. Hiding two chaotic twins who are basically their father’s face copy-pasted? That’s the real nightmare.

“Give me one reason, Liv.” He stalked toward me, cornering me against the edge of the desk. “One good reason why I shouldn’t bend you over this desk and f*ck you senseless.” My breath caught. “This is wrong, Damon. So wrong.” I pressed my palms flat against his chest, trying to create space. “You’re my brother-in-law…” “Not yet, love,” he whispered, fingers curling around my waist possessively. “You’re still engaged to him, but the man you’ll be getting married to…” Two fingers slipped into my heat, making me gasp. “…is me.” I should’ve walked away. I should’ve resisted. But I couldn't forget what it felt like to be his. * Olivia have the perfect life. The perfect fiancé. Marcus is everything she thought she wanted—sweet, charming, dependable. Safe. She thought she have it all figured out... Until the night of her engagement party, when she comes face-to-face with Damon—her ex. The man who had broken, damaged and left her for ruin, three years ago. The man she’s about to call brother-in-law. Now, old wounds rip open. Feelings she thought she buried, clawed their way back to the surface. And the man she once loved? He isn’t asking this time. Damon wants her back. And he’ll burn every bridge, including the one with his own brother—to make her his again. NOTE TO READERS: This is a dark, emotional, and scorching hot love story. It features a possessive anti-hero, messy family drama, emotional trauma, and morally gray decisions. If you’re looking for a soft romance with flowers and sunshine, this might not be it. But if you crave forbidden passion, flawed characters, and a love story that burns through betrayal and pains… Welcome to Olivia and Damon’s world.

Being a sweet, gentle, obedient girl, and never voicing her thoughts is what Gretta Mikhaelovich has always done. Because of all her gentleness and how respectable she was in anyone's eyes, the nickname White Princess had been pinned on her. But bad luck befell her because of one careless night. She gave her virginity to a man she never expected. Behind the glitter of the city of New York, Gretta's twin—Gallena Mikhaelovich—is arranged to marry Nicholas de Sanctis. A Main Director of an airline company from Italy which is listed as the largest company in the World. He was a good man, generous and kind—at least in the eyes of everyone he forced them to see. But, Gretta knew better. Nicholas de Sanctis was a man who took advantage of her unconsciousness and then took her virginity Nicholas de Sanctis is nothing more than a ruthless mafia man, a demonic figure hiding behind his angelic handsome mask. His ruthlessness is as rugged as his inherent good looks and perfection. Gretta didn't like the guy, but that didn't stop her from always turning into glass grains when she was around him. Even though that man was her brother-in-law, and being one of the people she despised, other than her parents, Nicholas had always been by her side. Controls her after he finds out what side Gretta always hides behind everyone. Tell her they are the same. Loving his touch more than she realized. Controling her. Gretta may be the obedient White Princess on the outside, but she loves all the darkness that Nicholas introduces to her. After all, she tries not to fall for the guy. Because the lines of reality that are between them are so clear. Gretta wasn't going to let him ruin her life even more.

One reckless night, I woke up in the bed of Ethan Van Horn — my sister’s ruthless billionaire fiancé. Now I’m pregnant with his child, and our powerful families have only one solution: force us to marry. He despises me for destroying his future. I hate him for treating me like the thief who stole what was never mine. Trapped in his luxurious penthouse, every cold glance turns into burning tension and every sharp word into forbidden desire. But the real danger isn’t the man I’m forced to call husband. It’s my sister — who will stop at nothing to take back the life and the man she believes are still hers.

On the night of my engagement party, I found my fiancé with his hands in my sister’s hair. I thought the betrayal ended there. I was wrong. Minutes later, Ethan stood in front of both our families and announced that he was in love with Ava. My sister. While everyone rushed to comfort them, I became the villain for refusing to smile through my own humiliation. Then Damien Black walked into the room. Powerful. Untouchable. The one man Ethan feared. Before the night ended, Damien handed me a contract. One year. One marriage. One chance to save my father’s company. All I had to do was become his wife. I should have said no. Instead, I signed. Now my ex can’t stop watching me. My sister can’t stop competing with me. And the man I married keeps protecting pieces of me I thought nobody noticed. The problem is that Damien Black is hiding something. And every day I spend with him makes me less certain that our marriage was ever supposed to be just a contract.

Three months, she was supposed to live with her sister's family for three months but how will she survive living in the same house with him when she harbors those nasty thoughts? How will she survive living in the same space with him when he was the reason she left for Paris three years ago? How will she hide the love and lust she has for her sister's husband?