Without sounding combatative, is there any evidence other than forum speculation that she is actually a narcissist?
Before coming on this forum and as an atheist, I've spent many years of my life talking with theists and also conspiracy theorists. One mistake they regularly make is thinking that because they can come up with an answer, that it is a good one. This is most obvious with conspiracy theorists. There was a recent flat earth experiment where they went and experienced the 24-hr sun, of course the flat earthers just dismissed it with claims of shilling and fakery and moved on.
We are all capable of this way of thinking in obviously less-extreme ways, when we have a conclusion that is firmly held. If something comes along that challenges something that we deeply believe, we scratch around for a possible answer. I'm 100% that the Turin shroud is a fake, but once in a while a fact will come out that I can't easily rebut. I then accept a less convincing answer because regardless, it isn't going to mean the shroud is real.
This is what I think people are doing with a couple of the key aspects of this case, and I'm not sure they quite realise it. They are so certain of her guilt that they can't see that saying murderers don't think about what happens afterwards isn't a very convincing answer, and nor is the idea she was filled with such hatred over what is a normal family dispute that she wanted these people dead at great cost to herself.
For me and some others, the evidence against EP isn't that strong and unexplainable by other ways that I can discount what the defence called anti-motives.
This isn't me saying I think she is definitely or probably innocent, I don't, but if I was a juror I certainly wouldn't be going in certain I'd be able to get over reasonable doubt.