[MFM] From cheating to Cuckolding

Hey guys. I’m a 27 year old guy who dates a stunning 27 year old girl. We’ve been dating for 5 years and got into cuckolding 1 year after we started dating. I had no cuckolding fantasies at all until I got together with her. Seeing how EVERY guy hitted on her made me jealous but, at the same time, made my head begin to think of sharing her.

She also had a BBC fantasy and so it was something that came up from both of us. She has been with 4 guys, all picked by us as a couple and everything always went perfectly for us. We have a very open relationship in which we tell each other any time we find someone attractive or if someone is into us. Oh and my gf is really into fit guys and big cocks.

Anyway, we now reach the story of the 5th guy or how I was first humiliated:

22nd December 2018: both of us had Christmas parties with different groups of friends that night. We were texting each other and were supposed to meet later in the night. Thing is, she got jealous because of some like I had on some girl on social media. So we met and decided we would go out separately. That was that for that night, at least that was what I thought.