In my review for episode 2, I said to be careful who you put your trust in because you never know who is waiting for the perfect moment to stab you in the back.... And this episode helps prove my point.
But to be fair, this entire series is built off betrayal, at least the first season is. But when a friend that you helped out countless times, for a political position as well comes to turn you in, it is no longer child's play. This is revenge. Literally, the show is called Revenge.
I have to say I would do exactly what Emily did in this case. I wont say much more on that matter because I want to keep this spoiler free. But if you're considering this episode, go ahead.
Which brings me to another point. I read questions and reviews and see that people are "just getting into a show" or "just starting", and ask if there's any episodes they should skip. If you really are "just getting into a show", NEVER skip any episodes. Of any series for that matter. You can never say that you are a true fan if you don't watch EVERY SINGLE EPISODE there is.
But that's not the point. Revenge is the point, and this episode will not disappoint.