We have here a man with a problem and a woman with a solution to that problem. The man's problem is that his wife won't let him fuck her ass. The solution to that problem happens to be his sister-in-law. Yeah, his sister-in-law. That's because his sister-in-law happens to be Syren De Mer, a porn star who loves anal. And in this scene, she gives up her ass to her brother-in-law.