Ruth Gogoll 
In the Heat of the Night [EPUB ebook] 

A steamy summer night on the Rhine, a hot love affair … it wasn’t supposed to be any more than that. But when Tina is in need of a lawyer, she cannot think of anyone but Mar. That’s when, out of nowhere, other feelings and not just the hunt for the right paragraphs, enter the equation.
Tina doesn’t want to hear about it, since the motto ‘It was just sex, not love’ still stands between them like a wall. Will they some day be able to overcome their differences?