You're tied to a chair

Light begins to hit your eyes as you slowly begin to come to. It takes you a moment to remember what happened, but as you take a deep breath in it all starts to come back. The first thing you notice is you're now sitting up in what seems to be some kind of folding chair, the second thing you notice is Amy sitting on your lap, her back towards you, riding your cock.

"What... What's going on?" You ask, still in a daze. Amy doesn't stop her actions, she continues bouncing herself on your cock.

"O--oh good! You--re awake." She says in-between pants. "I'm s--o cl--close!"

Her entire body begins shaking on top of you as she continues. Though you're confused and a little concerned, you have to admit this all feels pretty good.

"Oh god!" She shouts "OH GOD!!!" Her movements become spastic as she shakes violently. You feel her ass clench around your cock. Even if you were ready to cum as well, you doubt you'd be able to with the **** grip she currently has on you. Her grip soon lightens as her movements slow. The two of you sit there for a moment in rather awkward silence before she slowly slides herself off of you. Your cock exits her with a light "pop" as it's left standing in the cold air. You instinctively go to grab onto it, but it's at this moment you realize your arms are tied behind you. With one look down, you notice your legs are tied to the chair as well.

"That feels so much better!" Amy says as she leans down giving you a light kiss on the forehead. "I though I was never going to cum."

You have plenty of questions for her now, but the first one seems the most obvious.

"Can you untie me?" You ask.

Amy steps back, looking longingly at you before giving you a smile...