Recoil (Modern Romance Collection Book 1) by Natasha Stories

Reluctant step-siblings Julia and Colin meet for the first time at an engagement party for their parents, and dislike each other on sight, despite their obvious physical attraction to one another. They soon find they have a common interest, though – stopping the inappropriate and hasty marriage of her mother to his father. When they discover that the recent death of her father might have had something to do with his father’s business, they become allies. But what will they do about their own sizzling chemistry?