Mister Uno by Belle Brooks

Twenty-five-year-old Anthea Links is a columnist for Rogue magazine. The job she loves is on the line when she’s faced with writer’s block and given a deadline she knows she can’t meet—that’s until her best friend, Pip, comes up with the perfect idea.
Anthea never says no to a dare, and this one is so perfect it will solve all of her problems.

Twelve men
Twelve months
Twelve articles

But there’s a catch: Anthea can’t know the real names of the men she dates, and she must only refer to them by a Spanish number.
Mister Uno is unsuspecting victim number one. He’s domineering, alluring, wealthy, and a surprise packet Anthea never imagined.
Will Anthea be able to hide her identity from each gentleman suitor?
Will she complete the dare and keep her job?
And will she do it without falling in love?