I wonder if your mom is the same way with everyone or just with selected few she perceive she can dominate. Some controlling know-it-alls are very meek and submissive around people they are afraid of but then are aggressive and boisterous “know it alls” with those they think they can dominate.

I’ve met couple of women who were very submissive with their husbands but aggressive with other women or in situations where they could create a fake “know it all dominant personas” like internet bullies. I wonder how is her marriage to your dad? Is she the same way or is she submissive?

Most “know it alls” actually know very little on any kind of deep meaningful level. It’s a given. Does she like conspiracy theories? Lol And many controlling people don’t have much control in their every day life so they act this way to gain some illusion of control.

So I wonder how is she in different situation? Her husband? Work? Friends (if she has any)?