Don’t Marry the Duke (Wedding Trouble Book 1) by Bianca Blythe

What’s the worst that can happen at a wedding? A meddling brother... When Hamish Montgomery learns his older brother—a duke, no less—is about to marry the wrong woman, he vows to stop the wedding. A dramatic intervention is entirely reasonable in the face of a social calamity. A determined bridesmaid... Georgiana Butterworth is stunned when a handsome Scotsman barges into her bedroom and attempts to bribe her not to marry his brother. Never mind that she isn’t the bride. Georgiana has no intention of letting anyone—least of all an infuriating intruder with far too much confidence—ruin her sister’s chance at happiness. A wedding that must not be stopped... Hamish is certain the match must be prevented. Georgiana is equally certain he needs distracting. And she’s just the woman to do it.