"The Hunting Party" Poll Question

So, during "The Hunting Party", Jack's wife Sarah mentions that she has been cheating on Jack. But with who? Here was my immediate thought:

Remember the picture that Jack looked at inside the Hatch when they first met Desmond?



Is that Sarah?!

Per Currin's request, here is a picture of Sarah:



Per McCullough-Desmond's request, here are Jack's reactions to the picture from "Orientation".

Before:



After:



Let me know your thoughts.