A free mod for Mass Effect 3, by TheCraneOverlord.

Sarah Williams Mod is a modification for Mass Effect 3. The developer has always felt a certain disconnect between Ashley and her little sister, even though they look and act identical. It’s more than just a coincidence, there has to be a connection between them, but what it is, has yet to be discovered.

Installation

Download the file from the website and open it. You will see an option for Download & Install, select it, and follow the instructions.

After the download is complete, navigate to the folder where the mod is and you will find an exe file. Run it and follow the installation guide.