Nicely, she gets the towel for you.

You try to apologize but the delivery woman beats you to it. "Don´t worry, I´ll get it for you real quick."
She drops down and picks up the towel, leaving you standing there, fully exposed. For a second you feel her warm breath on your cock, then she gets back up. With a quick step she´s behind you, and wraps the towel around your waist, her hands quickly touching your cock in the process.
Your towel firmly wrappes around you again, she steps in front of you and takes the pen out of your hands.

"Thank you so much, and have fun with your package", Her eyes glide down to the now even more noticable bulge in your pants. "Your packages that is. I´ll work here the next couple of months, so maybe we´ll run intro each other again."

And before you can do anything but nod shes gone again, you only hear her steps on the stairs and the door downstairs closing.

You turn around and face Carrie, which looks at you with exitement. You can see the horniness in her eyes. "Oh my god..."she says, "That was so hot."
Her hand suspiciously close to her pussy she begins to ramble.

"I first just heard you talking and her young voice, how she was flirting with you...and then...did you drop your towel on purpose? No, I don´t want to know...but to think she saw you hard and naked, saw the hard-on i gave you...but the best part is-oh, you dont even noticed it,-during all this, i was sitting against the wall, masturbating while only seeing you from the side, and then, when she stepped in the appartement-god she is beautiful- to wrap the towel around you again, she saw me. She saw me sitting on the floor masturbating to her flirting with my boyfriend. And she winked at me and smiled, and then she was gone again. I almost came in that exact moment."

She looks at you, her eyes exited, her cheeks flushed red. You smile and let her continue to ramble while taking the package to the living room, where you open it with a pair of scissors. While doing so, you notice a set of numbers the delivery woman must have written down between all the chaos...her number.
Carrie interrupts her talking seeing the number, only to continue even more enthusiastic, "And i really think we should...-oh my god, is that her number?? She left you her number?? Ugh, this is all so new and hot, and-"

You interrupt her with a kiss. Seconds leater the two of you are laying on the couch, undressed, making out. Carries hand closes around your cock and guides it towards her pussy, but in the last moment, you pull away, grab the cage, and begin to put it on.

"Stooop, that not fair" Carrie shouts, but doesnt resist besides that. You put the belt on, but stop before locking it. You look your girlfriend deep in the eyes.
"Are you ready for this? Ready to submit to me completely, to give up your orgasms to serve me?"

Carrie nods, slow and nervous, then more determined.

"Yes"

And with a click, accompinied by a shudder flowing through Carries body, you lock her in.
You look at your girl, naked except for the belt, horny, frustrated.