To Ensnare a Duke by Vivian Murdoch

Vex a sadistic Alpha Duke, and prepare yourself for the consequences.

The headstrong omega may think these little games she plays are harmless, but she has no idea the monster that lurks beneath the gentle façade waiting to come out to play.
With each indiscretion, she tempts me, provokes me, and drives me to madness.
I long to strip her bare and deliver a lesson against her pert backside. One she won’t soon forget.
But since she is a Lady and my best friend’s sister, I force myself to stay away.All too soon, however, her intoxicating scent and careless, hoyden ways draw me back in.
Forbidden fruit may taste sweetest, but she’s not a morsel I can indulge in.

Seven Omegas for Seven Alphas is a dark omegaverse set in a world where title and rank is determined by dynamic rather than birth and where sweet little omegas are the belle of every ball.