Bonds of Beauty and blood - Triad Series, #1

Sylvie Hart doesn't want much in life. A steady income and an apartment out of the slums of Erus would do. But when her two alluring and dangerously provocative bosses claim she is theirs-sworn by fate and soon-to-be bound by blood-she is thrust into realms she could only dream of, or read about in her spicy books. Unexpected proximity forces them together, while blood-sworn betrothals and fae promises threaten to tear them apart.
That and the demon hybrids. Yet when unseen voices demand violence, Sylvie is compelled to follow or risk losing everything-her life included. Betrayal and cruelty lead to unwanted self-discovery and devastating power. When caged trauma is unleashed, Sylvie must use her past as fuel to fan her inner flames or risk being burned to ashes.