Suddenly, Anna pounced her way onto you, and her cock landed right in your mouth like an I block in Tetris, pissing all the way. Obviously, this was not something you would expect or enjoy, but her face said it all, she was enjoying this experience. Your girlfriend's younger sister, who has a cock, is taking a leak down your throat... The fuck was up with this house? Fortunately, you only tasted her piss on the way in, unfortunately, the taste of her shaft isn't much better, and perhaps most concerningly, she had an open smile with her tongue hanging out.
"Aaaaaah! You better not wash that mouth of yours before you make out with my sister. She'll probably think you're into drinking your own piss, probably gonna try giving you a taste of her own." Anna, having just emptied her bladder, got up and pulled her pants back on. "What the hell is going on?" you ask, shocked by the sheer amount of bizarreness you've witnessed in just one night. Anna, looked at your face, "Look, Zoe may be bigger, but that doesn't mean she can just bring over a guy and expect me to ignore you. And don't bother trying to tell her about my little 'accident' either, or I'll make sure you regret it."
The casual tone of her voice did nothing to calm you, it actually made you more nervous, "She's also not a shaver, just letting you know" she added. After she left, you waited for a minute and went back to the bedroom, hoping that this was all some crazy dream that has no real meaning.