Just One Spark by Jami Wagner

All Beth Moyer wanted was a one-night stand, an evening to relax and cut loose before she went to work at her new grown-up job. Instead, all she got was a few minutes that left her mortified and another reason why you can never trust a man.
Maverick Mitchell is ready to prove he’s learned from his mistakes and move forward. But before it’s time to buckle down, one last fling won’t hurt. Or so he thought. On the first day of his new start, the feisty redhead he met over the weekend is the first person he sees.

An office romance isn’t the smartest idea. Sneaking around is an even worse one, but neither can deny the fire that has sparked between them. Considering Beth and Maverick are competing for the same position and only one will be offered the job, they can only hope that every choice they’ve made doesn’t end up in flames.