Misfits

Imogen Doel plays a young woman who's been captured by her own boyfriend, who looks like he has a few screws loose.

This is from the British TV series Misfits, from the first two episodes of the fourth season. She's only revealed to be tied at the very end of the first episode, so this is from the second episode, which is much longer.

Her feet get untied and her pants get removed when she agrees to have sex.

However, once she get her legs around his neck, she starts squeezing, cutting off his air until he gets away and backs off.

It's a very nice, long scene, with the barefoot damsel in various stages of undress.

And you can see it right here.