Watching Henry by Sienna Waters

Three kids. Two women. One job.
Spoiled heiress Hadley Rains has never committed to a thing in her life. Until her father cuts off her allowance and she’s left with a point to prove.
Professional nanny Florence Underwood has problems of her own. Her old-fashioned methods are out of style, and she’s swimming in debt.
Enter the McLeod-Allen kids. Feisty, troubled, and reeling from the divorce of their parents, the kids need a nanny. But they end up with two.
When stern disciplinarian meets flighty brat, things really shouldn’t go well. And they don’t. Until a mysterious disappearance draws the two together.
Only true opposites can create a perfect balance, but can either one of them realize what they have before it’s too late?