Fake Cuckolding Becomes Real

[Fuumayami]

A story of a girlfriend and her boyfriend's best friend teasing boyfriend that they are fucking.
I'm thinking boyfriend shared he liked to be cucked. GF and Best Friend don't see the appeal and BF tries to defend it. GF and Best Friend then start teasing BF, sending him pictures of them being very close together without him there. This makes BF hot and bothered. GF and Best Friend keep sending pictures and text messages of their "cheating." It gets to the point that they like this little game they created. Then it gets riskier as pictures of them together gets boring.
How about swimsuits? A kiss on the cheek? Kiss in the lips with tongue, he'll enjoy that! How about you touch my breast? Let's get naked in bed? How about sending him a picture of your pussy and my hard cock close together? Take a picture of me about to swallow your huge cock? Maybe record me having a taste of your wet pussy? Then eventually the inevitable... "Oh fuck your best friend's girl!"
I'm thinking the conclusion will be BF coming in after they had their passionate fuck session and saying, "See... I told you it was hot."

 

[Rob_Royale]

That would work and I think would work great from her viewpoint. From a very monogamous upbringing, she's a little overwhelmed and apprehensive. Afraid he'll use it against her later if he becomes unhappy with the idea.