Patricia Kay 
Wrong Groom, Right Bride [EPUB ebook] 

"I do. " Chloe was one day away from becoming part of the most affluent family in Riverton…until her fiance married another woman! Pregnant with his heir, Chloe knew the only way to protect her baby from the powerful family was to keep her pregnancy a secret.Simon was used to cleaning up his brother’s messes, but he never thought he’d take such an interest in his latest fiasco — or rather, his latest fiancee. It was clear Chloe was hiding something, but as Simon’s feelings for Chloe rapidly changed from responsibility to love, he also had a secret of his own…