[AngelicaDeAlquezar]

In many countries, when your parents use "usted" with you, you're in trouble, and it's normally used for giving orders:

- ¡Cállese! ¿Quién le dijo que hablara?
Shut up! Who told you you can speak?

- ¡Apúrese, que vamos a llegar tarde a la escuela!
Hurry up! We're late for school!


But there are some regions, like some parts of Colombia, where the "usted" is used for addressing everyone all the time, your friends, your children, your partner...
I don't know how this works, because I've only seen it on television, but it seems to me an endearing treatment.