Tiene al marido bien metido en cintura

[ROBINDESBOIS]

In English?
It means that she is the one who wear the trousers, more o r less.

[poli]

You have the translation correct.
There are other terms as well:
She has him tied to her apron strings.
He's henpecked by his wife.

[ROBINDESBOIS]

Thanks POLI.

[Awaken]

"She wears the pants in the family" - That is a common phrase.

[ROBINDESBOIS]

Se puede usar tambien para hijos, empleados, estudiantes etc...

[ROBINDESBOIS]

Si digo tiene a sus alumnos bien metidos en cintura, quiero decir que les hace trabajar mucho, y que son disciplinados, en ese contexto como se diria?

[poli]

He's got his students well under control.

You can say: He's got them under his thumb.

[ROBINDESBOIS]

Muchisimas gracias POLI

[JPablo]

Ah, al contestar tu otro hilo de "a su antojo" te he incluido lo del "little finger", que también puede funcionar (aunque con otras connotaciones o 'nuances') con esta expresión.

maneja al marido a su antojo = she can twist her husband around her little finger