The Last Saturday In July by Sharon Black

Two Weddings, A Cursed Castle, One Unforgettable Day.

ON HER HEN NIGHT, Jess Bradley unexpectedly finds herself on a ferry to the Isle of Man, shipped off by inebriated friends. The outcome? A passionate one-night stand, an encounter she vows to keep secret to her dying day.
Back home, she grapples with the daily demands of her high-pressure job as a marketing manager for a prestigious hotel group. Then, to her horror, she discovers that the man she slept with is her boss’s nephew and her new co-worker, Adam Rourke.
Fate plays a wicked hand as Jess and Adam are thrust together to oversee a celebrity wedding at the opulent Linford Castle in the West of Ireland. Guilt gnaws at Jess as she struggles to hide her upcoming wedding from Adam while concealing her one-night stand from her fiancé, Simon.
To complicate matters further, the weddings are on the same day, and the American reality-TV celebrity’s relationship with her ‘Casino King’ fiancé seems to be heading for disaster.
In a whirlwind of emotions and secrets, Jess struggles to keep both weddings on track. She can’t escape the growing sense that chaos and catastrophe loom on the horizon, on the last Saturday in July.