That is not canon at all. Even after Fefeta exploded and Nepeta and Feferi’s ghosts returned to the dreambubbles neither of them talked.

I am actually really partial to the theory that the Caliborn we’ve been following in story isn’t the Caliborn that will become Lord English and is from an alternate timeline.  This Caliborn focused more on art and less on combat. This would explain why Hussie stopped talking to him abruptly and why the Caliborn in the masterpiece was surprised by things. Surely, if the Caliborn we’ve been watching who had seen the fight had been the Caliborn in the fight he wouldn’t have been surprised.  If Art!Caliborn was the Alpha!Caliborn then there would be stardust in the current post-retcon timeline as well, but we’ve seen no trace of it and John hasn’t been back long enough to blow it all away.

She can, Hussie was just being cruel since neither Feferi or Nepeta had talked in such a long time.

I really think bladekindeyewear’s “3rd Scratch” theory is stretching it. Caliborn’s session can’t be scratched because a) no scratch construct and b) the Cali twins were born naturally and not through ectobiology so a Scratch wouldn’t change anything.

It wasn’t a relationship in every quadrant, it was a relationship Beyond the quadrants. Meaning what they had was so intense and they were so close that it couldn’t be labelled as any quadrant.

Karkat called her autistic not retarded. Which could have just been him being a dick. Whether or not you believe Nepeta is mentally ill is up to your own interpretation and headcanons

Gamzee’s still sober post-retcon

Yes, Nanna is John’s adoptive grandmother and also his genetic mother.

One? I don’t know. We’ve only seen it on three occasions and from relatively the same angle.

Nanna is pre-scratch Jane, yes