Playing with Fire by Alix Nichols

He was supposed to look after her, not kiss her senseless…

Au pair Uma is all kinds of wrong for single dad Zach. Raised in a conservative Hindu family, Uma is his son’s nanny, a twenty-three-year-old virgin, and a guileless ingenue to boot. Zach knows all of that.
Then why can’t he rein in his lust for her?
If there is one man Uma should not be attracted to, it’s the father of the adorable five-year-old in her charge. Once burned twice shy, Zach is the captain of a pro water polo team and a wealthy entrepreneur who can have any woman he wants. No strings attached.
Small wonder he goes all out to shun Uma!

But when, with the help of a bottle of fine wine, Zach confesses all the dirty things he’d like to do to her, Uma astounds him by saying she wants that, too
What’s a man to do but oblige?
Besides, it’s not like it’s the end of the world. They’re both sensible, level-headed adults. They’ll just have a bit of fun and then go back to normal, as if nothing happened.
As if feelings weren’t already getting in the way.