The girls put up a little pool for their slave to lie down in while they're having a party. They're drinking, smoking and chatting - and of course they need to pee in between - luckily they've their human toilet right there with them. They simply get into the pool, stand above their slave and order him to open his mouth wide - then piss right into his toilet mouth!
This petite girl sits down on the toilet chair - with her slave already in position underneath. First she pees into his mouth for a long time - then the scat action starts. A giant turd is coming out of her petite butt - it's so wide and long the slave can barely grab it with his wide-open mouth. Of course he needs to swallow all of it as another turd is coming right after!