Just Curious by Ariella Talix

Secrets, curiosity, and passion.
Fantasy becomes reality with little encouragement.
Willa Camden, a successful author of steamy novels, becomes entwined with Jackson Mitchell, a brilliant billionaire, and his best friend Casey Melrose. Their love is shared equally, and Willa is not always in the middle.
Craving excitement, they embark on international adventures in the style befitting a billionaire.
Cyber threats, blackmail, and theft turn their world upside down. Their careers are jeopardized, and lives are in danger.