Say Yes Before Sunrise. Nightlock Sins, #17

Love built without a blueprint is a house with no doors. Laurel Keene is a brilliant forensic accountant with a dangerous secret: for three years, she has been anonymously dismantling her corrupt father's real estate empire from the inside. Living under a false name in one of his crumbling apartment buildings, she thinks she's invisible. She's wrong. Corbett Wolfe is a ruthless attorney and real estate investor who has spent those same three years living exactly one floor above her.
Driven by the tragic death of his mother, Corbett has engineered a master plan to strip the Keene family of their last major asset. Laurel isn't just his neighbor-she is the final, crucial piece of his puzzle. When a hidden trust clause threatens to leave thirty families homeless by sunrise, Corbett knocks on Laurel's door at midnight with a meticulously drafted prenuptial agreement. The terms are simple: marry him before dawn, or the building is liquidated by her hostile half-brothers.
As they navigate the neon-lit underbelly of Saint Mercy-dodging private security, secret hotel corridors, and empty courthouse steps-their independent plots for vengeance violently collide. What begins as a cold, calculated transaction turns into a high-stakes alliance. But Corbett's obsessive three-year surveillance has grown into a dark, consuming fixation, and Laurel is about to realize that the man saving her might just be the most dangerous threat of all.
Say Yes Before Sunrise is a gripping dark romantic suspense featuring a morally grey hero, a fiercely intelligent heroine, a tense midnight marriage of convenience, and explosive secrets.