Originally Posted by Spock
She can't really be bound by human morals though. She's an alien who happens to speak English.
This is still a movie made by humans, who could have created a plot without all the cheating if they had felt like it, or even realised it was an option.
If we're talking about the effect a movie can have on society, we should take into account the fact that it was also made by that society. It's not to say the movie is bad or that it doesn't make sense. But the fact that it can be justified in-universe does not mean it wasn't made by humans who had total control over the plot and decided to make it so it would make sense in-universe for her to cheat.