Welcome SME!! I hope you enjoy the forum
In regards to your thoughts bout Gideon killing Nathan I completely understand. I never got the chance to analyze that because well I wasn't part of the forum them and really I took the killing for what it was. Understood why Gideon did it, sooner or later Nathan was going to harm Eva, either kill her, kidnap her, I mean who knows. I think Eva understood this more than we ever could. Killing Nathan saved Eva, mentally and physically. That part of her life can be finally buried (no pun intended). Gideon freed Eva in a sense, Nathan always had this hold her and once he was dead she could finally let go. Let go of everything that happened.
Maybe Graves just didn't think about following Eva, maybe she didn't want to, or idk. I think Graves thought that by planting that seed that Eva would go back to Gideon like she expected and it would only be a matter of time before she found out.
Now I shall get ready to go eat some BBQ lol