After Marissa bought some cake in the bakery, she decides to let her slave have some tasty pieces, too, as he's a really well-behaved one (after she educated him through punishment). But nothing is for free - she spits the chewed cake on the ground and stomps on the piece, just to let him lick it from her soles again! The last piece gets a warm topping of spittle to arrange some healthy variety!
Madame Marissa is a caring mistress who never forgets to feed her slave. Of course she "helps" him with that and takes some healthy fruits in her mouth to chew them, until she gets a pappy bulk. Then she puts a funnel into her slave's mouth and spits the tasty smoothie into it. Since she's sitting on his body, he can't deny or move.. of necessity he swallows his healthy food.