Blood is Thicker Than Water by Wynette A. Hoffman

"Romance, laughter and gunplay result when Amy Reilly, a rebel without a cause, and her brother Paul Reilly, an occult store owner, discover that there are vampires in the really real world and you can haunt your ancient relatives. Add a meddling goddess, witchcraft, reincarnation, some elitist bloodsuckers and a vampire feud and you have a fast-paced fun read with lots of love, sex, violence and most important of all, family loyalty." (from back of book)

Paperback Info: ISBN 0972109803, Alien Perspective, 2002