Fiction; hero and heroine involved in a family feud. hero and heroine met at a bar and spent the night together without realising what clans they belong to

[Intisaar]

Hi, I'm looking for a book. I don't know the name or the author. It's a family feud kind of romance. Decades kind of feud. The hero and heroine met at a bar and spent the night together without realising what clans they belong to. After they found out they were both disgusted, they were raised to hate eachother. After that night, the hero's clan spread insults about the heroine. Basically they insulted her honor. Her family were angry and it looked like they were planning on fighting again until a bigger clan stepped in. They were tired of the fighting and forced the hero and heroine to marry in order for there to be peace. The threatened to wipe out both clans if they refused to co operate. The heroine didn't have the easiest time, with the hero's people constantly trying to undermine her. But eventually the hero and heroine started to develop feelings for eachother. If anyone can think of a book with that kind of plot please let me know, would appreciate it.