That's all a lie thooo she's not really there
Nooooo she is there. When she looked at the mirror and saw that frog (Osiris) a part of her went in the mirror, and that was the nephtys who love seth. While the other part of her soul stayed that loves mr.baldie.
I heard that was a lie tho idk still horuseth is the end game but at what cost shit is gonna go down anyway
Horus went back for her inside the mirror and she was no longer there (we see this in a flashback in chapter 193). I think that means mirror-Nephthys has returned to outside-world's Nephthys, the end-result of what the two mirrors' magic did to Nephthys in chapter 186.
Read at your own risk!!
SPOILER ALERT!!
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As we saw in previous chapters, Horus knows
That the nephtys who loves Seth is in the mirror. Although, in latest chapters he breaks the mirror-