Andrea has to help

Your mother lectures Andrea more, telling her, "Andrea, you left cum everywhere on the ground. After Kim is ready for John to fuck her, you'll need to lick the rest clean. Look at the trail that Kim left getting to the couch for starters. Now, honey, move over there on the floor and put this bowl underneath you. Go ahead and masturbate and when there's enough of your grool in there, I think you should be ready to get Kim's ass ready."

You lean into Kim and ask you, "You aren't bi, are you? Cause that was fucking hot with Andrea!" Kim kisses you and responds sweetly, "No, never tried with a girl but her anger just caught up with me. Your sister's bitchiness is intoxicating." Andrea protests more, "MOOOM, are you serious? HE'S FUCKING HER RIGHT NOW! Why the fuck do they need me?"

Before you can comment, Kim interrupts, "John is currently using my pussy so his cock has a place to rest. I've only been with him for a day and I understand that. How are you his sister and you don't understand these simple ideas? He still needs to cum. Andrea, you have been taking quite a bit of time here and as John says, he needs my ass ready for him to cum." You place your hands on Kim's hips and start fucking Kim with more **** now to show her your approval. As you grope her breasts and start kissing her up and down her neck, Kim continues, "I am doing my best here, Andrea. My holes have been available for John's needs all day, including a very public fucking in the grocery store. John is not even asking to fuck you, just for you to help him fuck ME."

Andrea looks around and raises her hands in frustration. She sits spread eagle on the floor facing you and Kim and puts the bowl just under her butt so that anything she drips will fall into it. It's uncomfortable as she tries to keep steady but your cock hardens and Kim's nipples sharpen so you kiss her from the back and keep on fucking her. Andrea looks entirely embarrassed and with one hand sitting on her side, she tries with minimal effort to rub her clit with the other. After looking around for something to focus on, she starts looking at the ceiling while she masturbates. Despite her best efforts, her nipples start to get hard but it's fairly slow.

Kim asks, "Andrea, this is taking quite a bit of time. Would it help you if I lick your pussy?"

Andrea responds in anger, "Fuck no, you pervert. Stay the fuck away from me, you sick perverted ...." Your mother interrupts, "Andrea, don't be rude! Kim is trying to help you here and if this is how you masturbate, it's not wonder you can't keep a steady boyfriend. That wouldn't keep anyone interested in you."

Kim pushes it further, "Andrea, why won't we have John lick your pussy? He's actually quite good. I mean, he's already made me cum more times than --"

Andrea explodes while still moving her hand to insert a finger into her pussy, "FUCK NO. I do not need my fucking brother to masturbate. You are really sick, Kim, a sick perverted freak. God damn, wait until the kids at school---"

Your mother interrupts, "The kids at school hear that you won't help your brother cum and that Kim has been more than helpful. I mean, I've already spoken with her father to thank him for having such a considerate daughter, one who is willing to put HER needs above others. You should be more like her, Andrea." Going for the third strike, Kim suggests, "Actually, Andrea, why not have your mom lick your pussy? I'm sure she's the most experienced one here."

Andrea stands up, "MOOOOOM? No, you fucking disgusting perverted freak." Seeing that your mother is confused, you decide to add, "Mom, it would really help me cum if you could lick Andrea's pussy so she cums enough that she can get Kim's ass ready for me to fuck." Even you have to admit you're going into absurdity here.

Your mother stands up and says, "You know what, you are right John. You too Kim. Andrea, stop arguing or else I'm canceling your modeling contract right now. Now, sit back down and I will lick you until you fill up this bowl and then you can start licking Kim's ass so John is ready to fuck her. Time's a wasting, young lady!"

Andrea looks on in horror. Your mother remains fully clothed, gets on the floor and positions herself in front of Andrea's pussy. She licks her daughter with aggression, grabbing Andrea by the butt to hold her into place.

As Kim leans back into you, you two sit and watch as Andrea keeps on arguing with her mother. Your mother keeps on licking her daughter's pussy with **** while stopping to lecture, "Andrea, you've not even a quarter into this bowl ... Andrea, touch your breasts, my hands are busy holding your lips apart, I can't do everything ... Andrea, stop squirming, you'll spill and all that work I've done will go to naught, I'm your mother here ..."

You sit transfixed on the scene when Kim leans back and gives you a peck on the cheek. She breaks your focus and you look at her smiling face before the two of you look back at your family's incestuous battle. Despite Andrea's cries and screams in opposition, she eventually moves into a stage of panting and then one of moaning as you wonder if your mother has some experience in this before.

After an incredibly long period of time, your mother pulls up Andrea from the bowl which you see is now full of Andrea's cool liquids. She proudly announces that Andrea is done and now it's time for her to get Kim's ass ready.