Is 'Eve Of The Wedding My Fiancé’S Adopted Sister' A Romance Novel?

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.

"Marriage was never on Ariana's mind. Living a lifetime with a man, living in a dream house, having children who look like him, and a partner - these were all beautiful daydreams that other girls might entertain, but not her. Ariana decided to live a single life and enjoy the rest of her days alone. However, what if she was forced to step into the shoes of her twin sister, who disappeared right before the wedding, and marry a man she doesn't know? Although some people might consider her lucky to be married to a young billionaire who owns an international venture company, Ariana doesn't feel that way. So, will her marriage go according to plan because people are pressuring her? Or would the results be different?"

The two brothers who were supposed to be in a marriage alliance with me fell in love with my adopted sister instead. They tricked me into shaving my hair just to cheer her up and locked me in a skiing cabin for an entire night. I tolerated their actions because of my parents' instructions. However, when my adopted sister accidentally slit her finger while cutting up some fruits, they forced me to the hospital to extract 2000 ml of blood. I cried and begged for mercy, but they said that I deserved to be punished for bullying my adopted sister. I gave up on them and turned to get into their older brother's car. The two men who had constantly been talking about canceling the wedding ended up crying in regret at my wedding.

Mirabella spent her entire life in her sister's shadow, serving as the family fixer who cleans up every disaster left behind by her golden sister, the perfect sister and the one who got the guy she had always crushed on. When her sister absconds on her wedding day to avoid an arranged marriage with Theodore Hartley, a calculated logistics billionaire with a soft spot to her and her family, the family’s survival depends on one final sacrifice. Mirabella is convinced by her parents to step into the veil, expecting a furious groom who will demand an annulment only to discover that Theo has been waiting for her all along. The wedding is a trap, meticulously orchestrated by a man who didn't just buy a wife, but claimed the woman he has obsessed over from the sidelines for years. As Mirabella is swept into the opulent, suffocating world of Theo’s museum-like estate, she realizes her life is no longer her own. Every gesture of his affection is a calculated move to bind her closer, and every secret she uncovers about his business threatens the fragile peace she’s trying to maintain. Trapped between a debt she cannot pay and an undeniable, terrifying attraction to the man who stole her identity, Mirabella must decide if she will continue to be the fixer for everyone else’s mistakes or finally break the chains of the man who owns her heart and her future, take back her life and love her the right way

I woke up in bed with my sister’s fiancé… naked, confused, and accused of drugging him. The cameras say I did it. The media says I ruined my sister’s engagement. My family says I must marry him to fix the scandal. But I remember nothing. Now I’m trapped in a marriage with a man who looks at me like I’m dangerous… while hiding a secret that could destroy everything. Someone framed me. And if I don’t find out who did it before this one-month marriage ends, the truth might be buried forever… along with me.

She has always lived in the shadow of her perfect, caring sister until one night changes everything. At her sister’s engagement party, what should have been a normal, graceful evening turns into something she can’t fully understand. A blurred vision. A stranger. A mistake she wishes she could forget. But the truth refuses to stay hidden. The man from that night is her sister’s fiancé. Now trapped in a secret that could destroy everything, she’s forced to question what really happened and why it feels like more than just an accident. As memories slowly return, one thing becomes clear—this was no ordinary mistake. And the deeper she digs, the more dangerous the truth becomes.