But she was also manipulated.
As far as I understood, she wanted to have a child with Seth, but osisris as the god of life, under the hood, wouldn't let that happen.
Osiris believed that children would chain Sth to her, he doesn't want Seth to be chained that way to anyone but him.
So during all the years that seth and nephytis were together they never had a child under the influence of osiris.
She really wanted a son, she was getting desperate, because the thing that Seth wanted the most was a family, so Osiris made the proposal to give her the son that seth wanted.
As far as I understand, that's it. There was not even sex between them, from what I saw. It was "just" a "blessing"
Not that I believe she was right, but ....
I love the twist in the story and how things are not like it seems. How the villain is a victim too and who seemed the victim is the villian. And that double non con rape damn. The mental damage is huge.
I read comments saying they want Seth back to his wife and son but I don't agree. I don't agree if it's true his wife never loved him back. Or was his wife also manipulated by Osiris? In that case aaaah. I just want to see Anubis and Seth happy T^T