Oh, I myself beleive their is... Everyone is entitled to their oppinion though.
We encourage people to get out of abusive relationships, but at the same time discourage cheating.
Some people are very afraid of their current partner and need the support of their fling to help them escape the abuse.
But other than that, I can see no reason to cheat at all, since outside of abuse, it's all the choice of the cheater then.