Now here we get the whole story and the reason why Abraham wanted to call Sarah his sister. Of course she is beautiful, and he felt that the fear of God was not in the general area; that his life would be in danger, he could be killed. So he believed his life was in the balance because of his beautiful wife and because kind of, sort of, well, maybe, she was slightly his sister, she actually, really, kind of was, but regardless of these things, God was not happy. In God's infinite wisdom and kindness, He does intervene and saves Abimelech from sin. Here we see that Abraham offended both Pharaoh and Abimelech by intentionally putting them in a situation where sin could occur. He was thinking about himself and not others.
Here we have a man sinned against; and Abraham in his unethical behavior committed a sin against him.
