Title: Billion-Dollar Heir for Christmas
Description: Escape this Christmas to Portugal with this sizzling one-night-with-consequences romance from USA TODAY bestselling author Caitlin Crews.

One unforgettable night… An heir claimed by Christmas! 
When Tiago Villela discovers Lillie Merton is expecting, a wedding is nonnegotiable. To protect the Villela billions, his child must be legitimate. But his plan for a purely pragmatic arrangement is soon threatened by a dangerously insatiable desire… 
Whisked away to Tiago’s Portuguese estate, Lillie agrees to his request for the sake of their child—or so she tells herself. Tiago might imagine he can marry her and ignore their incendiary chemistry, but Lillie can’t. And as the holidays approach, she has every intention of breaking down her husband’s iron control!

Great story
First few chapters odd/difficult to read. . See GR reviews 
But persevere,  has a Christmassy, kinda Grinch-like trope.
You could feel his heart growing.
Places: Spain, Portugal
People: Tiago Villela, Lillie Merton