I can see how Egwene needs her friends to address her by her title and show proper deference in public. That is vital given how she came to the Seat and how young she is. What some prople, myself included seem to have a problem with is that she wants them to carry this over to private gatherings.

Compare who Moiraine and Siuan acted when they met in TGH. In public it was all "mother" and "daughter" but once they were alone and behing a ward it was "Moiraine" & "Suian".

Egwene on the other hand insists that her closest friends call her mother even when they are alone in the world of dreams.

It would really have been fun if Nynaeve has instead of bending to obey Egwene's demand that she return to the tower instead told Egwene that she was staying to help the Dragon Reborn who was the only hope the world had and if that meant she could not be an official Aes Sedai that was a sacrafice she was willing to make for the greater good.