Okay but if the one who is now in the trial confessing is Nephthys, then who was the one o...

Honestly just don’t try to over think it

Ok so lemme try and explain

So we currently are not sure if really and fake nephthys are two different bodies, conciousness or nephthys split personality

But after Seth's marriage, the real conciousness of nephthys is replace with someone else who nephthys sees making love with Seth.

Now the real nephthys is locked in the mirror. Fake nephthys is the one who cheated, was in a open cage and didn't save Anubis. Just screaming anubissss from a open cage. And appealed to the court.

So we are yet to given more context on this