Threesome turned into cuckolding [MFF]

First of all, sorry for my bad English.

I’ll tell you a story of myself (22)
My girlfriend (20)
And my buddy (23)
I: B
Girlfriend: C
Buddy: M

So it all started with me talking to my girlfriend about whether she could imagine having a threesome.
She said she always wanted to try it but never got around to it.
The topic made us very horny and every time we had sex we talked about it.
At some point I made the suggestion to do a threesome with our buddy. (M)

It was a Saturday evening. (M) came to us around 8 p.m. and my girlfriend and I were already slightly drunk. We had a lot of fun and (M) started drinking too.

We listened to music and chilled on the sofa in the living room. At some point we got into a mood where everyone was very drunk and we started playing games.

(C) suggested we play Truth or Dare, and we agreed.
In the beginning it was pretty harmless and there were tasks like:
How was your first kiss or with whom did you have your first time.
And then (C) suddenly came up with the task that (M) should take off his shirt.
He did it without hesitation.
(M) did the same to my girlfriend and she had a huge smile on her face.
She took off her top and sat in front of us in her bra.
She has cup size D.

M) and I looked at each other and I started to smile and said no problem bro enjoy it.
It was my turn and said to my girlfriend: I bet you don’t dare to take off your pants.
And within 10 seconds she was sitting in front of us with only her underpants and bra on.
You could tell that there was a nice atmosphere in the room.
So we were in the middle of the game and suddenly my gf asked (M)if he ever had a threesome.
He answered no.
And then she asked him if he wanted to join one.
(M) got it right away and asked us if it was okay.
I meant , as long as it stays between us, everything is fine.

We all accept it and off we go.
I was so horny that I had to go to the bathroom to figure it out.
When I came into the living room 5 minutes later they were sitting on the couch.
She caressed his hard penis through his pants and they kissed.
My gf noticed me and asked if we can finally start now.
I meant that they can start already.

I sat on a chair and watched my gfsit on him and kiss him.
I started jerking off and watching.
They were completely naked very quickly and she was rubbing her pussy on his penis.
He was a lot bigger than me.
My girlfriend started moaning.
She Kneeled in front of him and looked over at me.
And then she kissed his cock and put it in her mouth.

She gave him a blowjob for about 10 minutes and then sat on his cock.
She started to ride him and I saw how his dick kept going into her.
I’ve heard noises from her that I’ve never heard before.
She rode him for a few minutes and suddenly her whole body was trembling.
My gf came on his dick.
Shortly afterwards my buddy came into her too.
He moaned very loudly and grabbed her ass cheeks.

Shortly afterwards everything was very quiet.
We were all exhausted and very happy with what just happened
I went into the bathroom and took a break.
When I came back they were both sleeping on the couch …

Pt 1 / 2

Source: reddit.com/r/gonewildstories/comments/lfpjkc/threesome_turned_into_cuckolding_mff