Fake Mating To My Ex's Powerful Enemy

All my life, I've been the backup daughter. My sister Beatrice got everything—love, attention, the golden child treatment.I got leftovers and reminders I wasn't good enough.
Until I discovered Niall,gorgeous Alpha from the neighboring pack,was my fated mate. Finally, my turn to be chosen.
God, I was naive.
Four years of engagement hell.Bleaching my hair to suit his tastes. Squeezing into tight dresses, playing his personal maid—only to hear I'd make a better servant than mate.
All because his heart belonged to my sister.
That night,I accidentally knocked over their picture frame. He slapped me. Hard. Said I'd never measure up to her.
So I slapped him back, tore up their photo, and accepted rejection.
I thought it was over. Until I caught them at the club, laughing about how pathetic my four years of trying had been. The whole engagement was their sick game.
Drunk and furious, I did something reckless with my mysterious neighbor. Alpha Hudson —face carved by gods, danger in every perfectly tailored line.
Most importantly, he's my ex's nemesis.
So? Best sex of my life.
I thought it was a one-night stand to forget.
Wrong Again.
He's richer than Niall, more powerful than my family, and infinitely more dangerous.
And he's not letting me go.
This time, I won't be anybody's second choice.