On an alien world their was a horrible disease that wiped out the entire female population. The remaining males began searching for similar matches so they can continue to repopulate. They soon discovered Earth. They found that humans were the closes match in the universe. They began to match the DNA from the males to the females on earth and when they found a match they took her back to the planet but there were rules. The females could not be married or have been married because then they wouldn't show up in the system. Centuries later the remaining males have restored their population to new heights, but these females were slaves or just for child bearing they were respected and loved by their mates. The males were taught from child hood that if you hurt a female you will be killed and worse. Plus its in their DNA to love their wives which made a connection deeper than physical.
Your OC was just about to kill her self as the sun went down into the sea when a large flash appeared and