I think that it's about a woman who wanted a relationship (or more likely just sex) with a man who was married or in a relationship. Then he changed his mind and something happened between them and now it is going to be on his mind because he will feel guilty about it and she feels that she was wrong for comming onto him in the beginning. She knows that he is going to have a lot of problems in his life because she was wrong.
I think that it's about a woman who wanted a relationship (or more likely just sex) with a man who was married or in a relationship. Then he changed his mind and something happened between them and now it is going to be on his mind because he will feel guilty about it and she feels that she was wrong for comming onto him in the beginning. She knows that he is going to have a lot of problems in his life because she was wrong.