Kissed By Her by Chelsea M. Cameron

I was so looking forward to this summer. My job as a nanny for eleven-year-old twins means never a dull moment, and I’m excited about hanging out with my best friend, Joy, and reading all the books we can get our hands on next to my employer’s fabulous pool.
Then my boss goes and hires a new assistant who is clearly gunning to be his second wife. Honor Conroy could not be more obvious in her motives and I can’t understand how he doesn’t see it.
She keeps getting under my skin, and even the twins are pulling pranks to try and get her out of their lives. I deny any involvement when their father finds out about their hijinks.
Then Honor decides to invade my book club—my sanctuary. I’ve had it, so I decide to confront her and, somehow, in the heat of the moment, her lips end up on mine in the fiercest kiss I’ve ever had in my life.
Turns out the gold-digger I imagined isn’t the real Honor, and my heart may never recover from finding out who she really is under that ice-queen facade.