"Well well, isn't it a coincidence that 2 princesses and 2 princes from 2 different eras meet each other. I'm not surprise at all!" said Maleficent coolly.
"Who are you?" asks Cinderella, frightened and trying to keep her voice as calmly as ever. "I'm Maleficent, the Mistress of all Evil." replied Maleficent with pride, Aurora suspects that this isn't the Maleficent that she always knew, as she can tell from the glow onto her eyes. This is an evil Maleficent!
Aurora immediately yelled "You are not Maleficent! You're the evil Maleficent!" At this point, Maleficent declares "It's true! I'm not your Maleficent anymore and I was the one who magically transported 당신 here!" She cracks into her evil laughter and vanishes.
At this point, Aurora bursts into tears and Cinderella, Prince Philip and Kit came to comfort her. Saying that the evil fairy will be perished.

Prince Ali, yes it is he
But not as 당신 know him
Read my lips and come to grips with reality
Yes, meet a blast from your past
Whose lies were too good to last
Say hello to your precious Prince Ali!

So Ali turns out to be merely Aladdin
Just a con, need I go on?
Take it from me
His personality flaws
Give me adequate cause
To send him packing on a one-way trip
So his prospects take a terminal dip
His assets frozen, the venue chosen
Is the ends of the earth - whoopee!
So long, ex-Prince Ali!

This is my opinion only. But I believe the reasons that Evil 퀸 from Snow White and Lady Treamine from 신데렐라 mistreat the titular characters is different from the in-story explanation.

Evil 퀸 used the fact Snow was pretty as an excuse to get rid of an heir to the 왕좌, 왕위 which I presumable that the 퀸 was ruling for Snow.

Lady Treamine's daughters might be older 의해 a few months in the animated 디즈니 movie. And back in those days older daughters were suppose to marry before younger ones.

I don't really have a reason for Edward's step-mother, Narcissa. But I assume that the Kingdom is suppose to be run mostly 의해 a Queen?