The janitress

You were tied up for what seemed like hours. Finally you hear some noises from down the hall that sound like a floor buffer. Then finally the door swings open.

The janitress, dressed in a gray shirt and pants drops the end of the buffer in shock at seeing you.

You squirm letting her know you want to be freed.

"Oh my ga.."

She rushes over to you and pulls the tape off your mouth. You spit out the panties.

"Thank you, you don't know how long I've been tied up here... the girls did horrible things... they..."

But she's not listening to you, she's now become fully aware of your nudity and has started staring at your fully exposed dick.

Sensing the attention, your member starts to harden almost by instinct.

Realizing it you start "I'm so sorry, please if you'll just untie me" you say.

"You know I don't think I'm ready to untie you yet."
With that she slaps the duct tape back on your mouth. You yell in vain and she gets a sly look in her eye.