so the memory of nephtys who loved seth is stuck in the mirror, and the nephtys outside is...

That's the power of the mirror + it also amplifies ones darkest desires. Horus was gifted one by hator so that he'd fall in love with her as well but he saw Seth in it and therefore he wasnt trapped ooof

Can I ask why Horus saw Set and why Nepthys saw Osiris? Why did one see the same person and one did not? Did Osiris do something to the mirror that Hathor didn't? Why didn't Hathor do something? I don't quite understand what she was expecting..

I'm also not sure how this actually happened maybe they'll reveal in future chapters? But most likely maybe Osiris tampered with the mirror intending for Seth to see him when he picks it up but nephyths ended up using it and in case of hathor I'm not sure why horus didn't see her as she gifted it to him and saw Seth luckily

I understood that Isis saw Osiris because he was like the previous love (so the part that loved Seth was stuck in the mirror, and the one loving Osiris is now out). For Horus, only one love in his life (Seth, path and present) so he didn’t switch and remain in the mirror (because he saw the same person).

Or maybe we will se something in the next chapter: as she was touching her tummy, I think now she will meet Osiris (asking for the seed because maybe Seth - thanks to that fucker - can’t give her a baby). Maybe she saw Osiris after having Anubis?

In chapter 17 Hator was looking in the mirror but Seth took it from her and looked into it and in the same moment Horus was looking into it too, so Horus saw the one he already loved instead of Hator. Osiris must have had been looking into the mirror when Nephthys saw him. (really hope this makes sense lol)
My guess is he wanted Seth to look into it and "fall in love" with him..

You could be right, because I think the only reason why Osiris gifted his gifts to his siblings was so it didn’t look like he was interested in Seth, if he just gifted Seth all the presents everyone would suspect him so he had to act like he was sharing his gifts with his siblings and Osiris probably knew what the mirror could do and that’s why the mirror was found in Seth’s gifts so Osiris thought that Seth would go through all the gifts and have him look in the mirror so he can fall in love with him but luckily, Seth didn’t

I accidentally down voted I’m sorry

That's interesting. So there are 2 mirrors that are linked. This explanation seems to be the one most sound. The person on the other side must be really creepy to be on standby looking through the mirror all the time.

Ohhh that's damn sneaky! Good for our non-materialistic king!

Now I remember!! It must surely be this. When hator gifted her mirror she was sneakily trying to make horus fall for her so she was gazing at it on the other side but Seth took it n horus saw him and bonus is hw alrdy loved Seth but in case for Seth n Osiris Osiris must've been trying to do similar thing but nephyths saw him insyd of Seth