A special bowl for her to eat from

Shortly after you left, you return with your surprise in hand, as well as Mia on a leash crawling beside you. Tracy's eyes go wide when she sees what you've brought her. In one hand, you have a steel dog bowl with the word 'SLUT' engraved in gold letters on the side and in the other is an identical one with the word 'WHORE' engraved instead. You leave Mia kneeling next to Tracy and the two of them watch on as you go and place them next to the wall.

"I got you both these gifts a little while ago and have been waiting for a special occasion to bring them out. I figure you can use them to collect your special treats and eat from them when we have guests after work like we usually do."

Tracy and Mia both smile at you and look down at these tools that you'll be using to further **** them in the future.

Mia then looks at you slightly confused. "What's the special occassion though daddy?"

"Your sister's brought home dinner for the two of you."

Mia turns to Tracy confused, who rubs her belly and looks into her sister's eyes. Mia still seems slightly confused so Tracy spells it out for her.

"My ass is filled with cum, and some piss." Mia's eyes open wide with surprise.

"You mean that's all...cum...in there?"

"Yep."

Mia looks deep into Tracy's eyes and says "god you're the best sister a girl could ask for" before leaning in and making out with her passionately. After a short while of watching the sexy display, you decide it's time to move on.

"Alright, enough of that for now. It's time to eat, Tracy's starving. Slut, come squat over the bowl for me and you, whore, come help her get this bottle out of her ass."

The two girls do as you say and crawl over to the two bowls by the wall. Tracy then squats above her bowl, leaning her back up against the wall, whilst Mia kneels next to her before grabbing the bottle with her hand. Tracy's face fills with a look of deep focus as she squeezes the muscles in her ass to try and release the bottle that's been lodged up there for who knows how long. Mia helps by gripping the neck of the bottle tight and pulling as hard as she can.

"Oh fuck, this thing's so big."

"You're doing great sis. I can feel it coming. Keep pushing!"

Suddenly, Tracy's ass gives way and Mia is able to yank the bottle out of her ass. A slimy white/yellow concoction comes flowing from Tracy's ass like a waterfall, making a wet sputtering sound as the flow begins. There's so much in there, and it just keeps flowing and flowing. Tracy's face looks to be filled with relief as the cum that's been filling up her guts all day is finally released from her ass. You can see that her bowl is filling up now and the flow hasn't even slowed down yet.

"Move to the next bowl slut."

Tracy snaps out of her ecstatic state of release and shuffles to the side so the cum is flowing into the other bowl now. The cum keeps flowing until the bowl is almost completely full and then finally Tracy's ass makes a wet farting sound as the last drops of cum come spraying out of her ass. Tracy leans her head back against the wall and sighs at the sweet relief she feels, finally having emptied out her guts. Her belly has now shrunk down to it's normal size.

"Alright then girls, drink up."