The Duke Takes a Bride (Entitled Book 2) by Suzette de Borja

She was in love with her best friend’s brother. He was known as the Delicious Duke, a sexy, out-of-her-league billionaire engaged to a princess. He was off-limits until that night Imogen dared kiss him and he kissed her back. For a few hours he had been hers. Now Julian Walkden was back. Jilted by his fiancee, he thinks Imogen would make a suitable replacement bride. He promised to give her everything as his wife, except the one thing she needed…his love. This is a complete, standalone romance with no cliffhanger.