Weekend Wife by Erin McCarthy

Grant Caldwell has been coming to the same diner for waffles (which he hates) for weeks just because he has a crush on one of the servers. But that time is coming to an end. He can't continue to torture himself so he leaves a large tip and prepares to exit her life.
Leah has been flirting with Grant since he started coming into the restaurant where she works as a singing server. When she finds a hundred dollar bill under his plate, she thinks he made a mistake and rushes after him. That turns out to be a mistake when she is injured. But that does get Grant up into her house for one delicious afternoon. And that's all it's going to be. Until Grant shows up again asking her to play his fake fiancee so that his father will turn over the reins of the family company. 
A little thin in places, the sex is pretty hot and the story is pretty decent for a free book.  

Three stars

Followed by Five First Dates

This book came out February 3rd, 2020

Ebook from Kindle

Opinions are my own