Married Off by the Duke by Carrie Lomax

She thinks her guardian hates her…but he’s secretly loved her all along.
Having grown up as the ward of powerful men, Miss Emma Willis is resigned to being unwanted—particularly by her current guardian, Lord Maximus Aloyisius Tremaine, the Duke of Ardennes. When he abruptly orders her to find a husband, she’s prepared to fight him tooth and nail—just as she’s done ever since the unfortunate day they first met.

Max has always delighted in riling up his prickly ward, but one unexpected kiss causes him to realize that the only candidate he’ll consider for her husband is himself. With only two weeks to convince her of their true connection, Max must now fight to win the one thing he never anticipated wanting: Emma’s love.