Unfortunately Jack only knows the partial truth about Amanda and Emily's past.
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The chilling final scenes from Revenge's "Retribution."
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Jack asked Emily to give the eulogy with all of Amanda's family and friends in attendance.
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She's gone, Jack. The truth about Amanda comes out in this emotional clip from the Revenge episode "Retribution."
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Victoria and Conrad meet with Mr. Trask of The Initiative in this clip from Revenge. Which side will gain the most leverage?
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Revenge is back March 10 with "Retribution." Basically, expect Emily to go off after what happened.
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Revenge Season 2 Episode 15 Quotes

Nolan: As far as me sticking by your side, I think you know by now I'm not going anywhere.
Emily: Then don't ever tell me to let go, or to ease up, or to forgive. Not when I'm standing here covered in the blood of one of the only people that I ever loved.

In its purest form, an act of retribution provides symmetry, the rendering of payment for crimes against the innocent. but the danger of retaliation lies in furthering the cycle of violence. Still, it's a risk that must be met when the greater offense is to allow the guilty to go unpunished.

Emily