Owen Marston could never forget the passionate Vegas weekend that ended at the altar with Isabella Cavaletti. Or the way his new bride walked out on him the morning after. The footloose librarian obviously wasn't cut out for married life. So what was she doing at the injured firefighter's bedside?Marrying a man she'd known for only three days in the Elvis Luvs U Wedding Chapel definitely rated up there with one of Izzy's wilder and crazier moments. But now her "impulse" groom needed her back at his side. Except the longer she stayed with her tooarousing temporary husband, the more permanent she wanted the arrangement to be...