A few months later I met him again.

Hi how are you?

Good, what about you?
Yes, everything is going well with me.
We had a nice conversation together.
Say, would you like to come home with me?

Show me, and we'll walk up the stairs to the bedroom together. 

He opens the door and in the middle of the room hangs a sling, with wrist and ankle cuffs.
Have you ever been in there?
No, never!

Okey, just undress and lie down, he says suddenly.

I hesitate for a moment, undress, he says again.
I take off my t-shirt, followed by my pants and underwear.

Finally I take off my socks and stand naked in front of him with a hard cock.

Yes, you are horny and he grabs my cock and gives a short stroke.

Just lie down and he guides me to the sling.

When I'm lying in the sling, he grabs my hips and pulls me down a bit, so you lie properly.
He takes one leg and locks it in the ankle cuff, followed by my other leg and a few seconds later I am straddling him.

My hard cock is on my stomach. Open my ass for him,
He walks around and now grabs my arms and puts on the wrist cuffs and tightens them.
Yes, that's fine and we'll continue walking together.

There I lie defenseless before him, tied up and at the mercy of his will.
What is he going to do to me?
So horny slut and what do you want from me...he is standing between my spread legs again.
His hand grabs my balls.
Do you want to give me a blowjob?
And I feel him gently squeezing my balls.
Yes, I will give you a blowjob, I say.
Do you want to be fucked (safely)?
I think for a moment, it takes too long as he squeezes my balls harder.
Well what do you want?
Yes you can fuck me.
Good, because from now on you are my slut and I decide what will happen when you are in the sling.
Would you also like to try a threesome?
I think it would be cool to experience it once.
It'll be fine, you'll notice it automatically. 

He is still dressed, what is he going to do with me...all questions that run through my mind. ......