This sounds like Hijacked Honeymoon by FrostyVanilla on mediaminer
www.mediaminer.org/fanfic/view_ch.php?cid=378074&submit=View+Chapter&id=111272
Hijacked Honeymoon [ Y - Young Adult: Not suitable for readers under 16 ]
Anime/Manga: InuYasha
Genre(s): Romance | Type: Alternate Universe
Latest Revision: February 11, 2006 03:08 EST
Author: FrostyVanilla
Pages: 106 | Words: 99487 | Size: 625 KB | Visits: 9966
Summary:
Kidnapping Kagome Higurashi less than an hour before she said "I do" wasn't special operative Sesshomaru Chikarou's idea of a manly mission. But his assignment was clear: safeguard the bride-to-be until the threat against her and the United States was put to rest. Keeping his hands off the vulnerable beauty was another matter altogether.
Kagome was supposed to be marrying her fiancé, not running from him. But if Sesshomaru was right, her espoused was more interested in her funeral than her wedding. Now she was on the run with a sexy, enigmatic agent whose touch made her question her true feelings. If she and Sesshomaru survived, could a marriage be in her future after all?