El Secuestro

In the movie El Secuestro (1974), Claudia Islas is kidnapped by a wealthy blind man.

At first, she's kept bound and gagged in her nightgown (and bare feet) on a circular sofa (or is it a bed?).

Her kidnapper unties her. He removes her gag and the ropes from her wrists.

But he leaves her to untie her feet.

Later in the film, she's tied up again, but this time fully dressed and wearing boots. The clip has both scenes, and you can see it right here.