Nightbound by Lilith Ember

She was hired to design their private floor. They decided to keep her.

Aria Sinclair takes the job at The Obsidian—an exclusive members-only club with unfinished private suites and two owners who watch her work like they already know how the story ends. Lucien Kane is controlled, precise, and devastatingly intense. Cassian Holt is warmer, filthier with his mouth, and just as possessive. Together they are a problem Aria never planned for.

Late nights turn into shared showers, leather daybeds, and the kind of claiming that leaves her shaking. When she discovers the second contract—the one that pays her mother's medical debt and offers her a permanent place in their world—Aria has to decide whether she is being bought or being chosen.

She chooses them.

Both of them.

Nightbound is a high-heat MMF why-choose erotic romance with emotional stakes, possessive attentive heroes, graphic explicit content (including double penetration), and a heroine who keeps her agency. No fade-to-black. Adults only.