Yeah, this exists, theres a whole series of amateur videos with some backstory. Some guy pretended to be a lesbian dominatrix and seduced a hot lesbian online over the course of several months, getting her to do kinkier and kinkier shit on webcam, and for the final act of submission before they could meet, he convinced have to have sex with a man; something she found abhorrent. Of course the guy who set it all up was the one she had to have sex with.
The videos document the whole process, sucking and fucking and her being all like "I just fucked a cock for the first time, I feel so dirty but thats why it is so hot". Then in the videos she gets told to act really slutty and so phones a bunch of guys (presumably men who had previously pursued her and been rejected) and says stuff like "hey Johnny, guess what? I just sucked a cock, and it wasnt yours!" The whole series is hot without the backstory, and the guy's face and voice are carefully edited out, which makes the whole thing a bit more believable. Anyway, I favourited it but its apparently been taken down since then(adding more to its credence) If I find it again I'll post it