Here's a porn industry secret: People are fucking all of the time. We're not talking about fucking on-camera, although there is plenty of that, we mean off-camera. This is especially true for first-timers and amateurs. They get caught up in the excitement of filming their first porno scene and they get carried away. We tell these amateurs, girls like Helena from Detroit, that they're allowed to fuck anybody they want (as long as all parties agree), but if it's in our studios, we're going to film it.
That's what happened with Helena. She was flirting with Mirko Steel, a porno veteran, backstage after shooting her very first scene. She was smitten immediately, so she took him into the bathroom. At first, they didn't notice our camera operator in the next stall. They noticed him by the time Mirko's big dick was planted firmly in Helena's tight asshole.