"Alright, you're up" he said, as he walked in, his buddy closing the door behind them. As I began to get up, he countered, "no, on your knees", as he unzipped, turned to his mate, and explained "this is the swallower I told you about".
Pulling out his cock and turning back to look down at me, he instructed "now you're gonna open your mouth and suck my dick, and you're gonna take my fucking nut; ALL of it. And when you're done swallowing mine, you're gonna stay down there with your mouth open and take care of my mate and swallow his."
I nodded, which elicited at curt "good, now suck it you dirty cunt, and don't even THINK about pulling off until I'm done using your fucking mouth!"
So suck him I did, and I really couldn't pull off even if I'd wanted to, as he had at least one of his hands (and frequently both) clasped firmly on the back on my head, as he furiously pumped his fuck stick in and out of my moist mouth, looking over at his mate and grinning as he thrust deep and held my mouth right down on his base.
True to his word, he did cum in my mouth, making me swallow it all, and no sooner as he'd pulled out, and before I could so much as catch a breath, his mate was my mouth, doing the same. He was a little less aggressive, but his bud took charge towards the end, holding my head down onto his mate's throbbing shaft as he blew, ordering me to "stay the fuck down there and swallow for him!"
So swallow I did, all six spurts of his fuck fluid, letting it slide across my tongue and down my throat, until he'd released it all. When he was done, he pulled out and let out a sigh to his bud, who immediately exclaimed "one for the road" as he mounted my face and rode for about 60 seconds before dumping another batch of ball juice down my throat.
By this time, his mate had zipped up and as his bud pulled out, he demanded I "suck it fucking clean" (which I did), before he too zipped up, looked down and said "you're not done yet, the next shift will be in shortly and we'll be back later for more".