The Billionaire's Ece by Bec Lindermbra

As a cocktail waitress Regan comes in contact with all sorts of people, including Carter. He's an incredibly wealthy man, a billionaire in fact. Everything seems like it's going well but Regan is uncomfortable with how vastly different they are. From background, to culture, she thinks it's too good to be true.
This is a really good story. It is also the second book in the series, however it can be read independently. I'm planning on looking into the rest of the series.

The story is so very steamy, and passionate. In case you can't tell there is sex. Lots and lots of graphic sex, including some BDSM. So if you're not interested in that I'd avoid this book.

I also enjoyed that it gives you two different perspectives. Starting in Regan's and ending in Carter's. I love being able to see both of the main characters grow, to see what motivates them.