The Unhoneymooners, Christina Lauren
Fun! This book is up my alley - it's an unusual take on love and relationships - and not exactly what I would call a total HEA; part of it is, part of it wasn't. And with it being a bit messy, it feels more realistic, which is what I tend to lean toward.
Twins Ami and Olive find themselves at Ami's wedding, where Ami and the entire group of wedding guests get ill from the reception food, except the two who didn't eat it - the brother of the groom and Olive. Of course, these two despise each other. But, as the honeymoon is set and unchangeable, the brother, Ethan, and Olive take off to fill in for Ami and her new husband in Maui.
The story gets a bit predictable here, but it was done with a lot of fun, and easy to put the predictability in the corner because of the banter and antics. Of course, Ethan and Olive fall for each other until they get home, and all hell breaks loose. But, you will have to read it to see how it ends (you will thank me later).
I was surprised to learn that two people authored this, Christina AND Lauren (so very cool!). Ladies, you have done an excellent job, and I will look for more of your work.