"Of course, she'll test it now. I don't want to buy a broken machine!" Afraid that contradicting her mother any more would start to seriously impact her ability to speak, Joanna tersely nodded while averting her eyes.
The clerk stared incredulously at Joanna's mother, Gloria. "Ma'am, we do not allow masturbation within the building. There would be no point in-"
"That's fine. My daughter can get used to the sound and feel." She picked up the box. "Here, Joanna. Go in the room and test the device."
The clerk's face twisted with disgust. "You do understand the damage you'll be causing to your daughter, correct? Frankly, we should've destroyed this milker. It's better suited for a cow than a human." The clerk then turned to Joanna, tapping her on the shoulder. "Why aren't you more resistant to using this? It's your body that's going to be damaged, and you'll likely be disallowed from using it anywhere outside of your house. The machine is useless for your purposes of removing milk while out and about."
Joanna was thinking of what to say when her mouth went without her. "Because contradicting my mother results in punishment."
The clerk stepped back, narrowing her eyes toward Gloria before lowering her voice. "Should I call child pr-"
Gloria immediately stepped between Joanna and the clerk, her face as red as a beet. "Go in that room and milk yourself until I tell you to stop. Now!" She wheeled in place toward the clerk. "And you! How DARE you talk to my daughter in such ways! Your job is to only sell us what we ask for, not to question how I raise MY child!"
Joanna was mortified by the turn of events, and decided to just go in the room and get this over with. There was thankfully no one else in the room, so no one saw her carry the unwieldy box to one of the far tables. As she pulled the machine out, she could easily confirm the truth to the clerk's statement. The suction cups on this device looked to be nearly half a foot long, better suited for a cow's teats than anything human.
The machine looked like it had some serious power in its engine, as well, which made Joanna wonder how they could've possibly messed up the suction process so badly that it couldn't pull milk out without needing an orgasm from its user. She tested the apparatus, and just as promised, it was a loud device and she could feel the suction when passing a hand over the cups.
She turned it off, then lowered her oversized rack onto the table. Her nipples were already fairly large due to the sheer size of her tits, which made it fairly easy to hang the cups with the machine powered off. "Well, here goes nothing."
The machine roared to life, and Joanna immediately felt the cups yank on her nipples, hard. She'd always thought this milking process was supposed to feel good, but this was truly agonizing. It was like the cups were trying to suck the entire breast in, rather than pull the milk out.
It was easily a full minute before she started to see any milk, but it was a measly trickle that wasn't even enough to reach the tank. Joanna was more concerned about the pain not going away, and more concerningly was how deep her nipples had managed to get down the cups in such a small period of time.
By the time 15 minutes had passed, her reddened nipples had been pulled nearly all the way into the cup, but a reasonable trickle of milk had finally begun to get pulled out of her breasts and into the tank. Joanna couldn't tell if it was numbness from the stretching, but her nipples had finally begun to stop hurting. Thankfully, the argument between the clerk and her mother had died down. What was odd, however, was that neither were visible through the door. Since her breasts were still clearly full of milk, she decided to pass the time playing with her phone.
It was another 30 minutes before Gloria walked through the door. "Joanna!" she half-shouted over the thundering device. "Turn off that thing!" After Joanna obeyed, her mother came forward. "Certainly loud, that thing."
"It hurt a lot for a while, but it's working. It seems to do a better job the longer it takes." As she slipped the cups off her nipples, she was mortified by what she saw. The machine had pulled for so long, her nipples were already at least 3 inches long! "Oh my god! My breasts!"
"Yes, dear. That clerk did say something about it." Joanna noticed her mother sneer upon talking about the clerk. "Now, pack it up so we can bring it home."
Joanna was about to argue, but she knew it was pointless. Regardless, this could all be undone by the chronivac. All she'd have to do is regain control to fix this. That, or her mother would fix this. She'd have to be insane to leave her child in this sorry state. Packing up the machine, she hefted it up.
Upon leaving the lactation room, they walked partway down the aisle until her mom stopped. "Joanna, say goodbye to the clerk."
She was initially confused, until she realized her mother was looking at a mannikin. Now that she thought back, there wasn't a mannikin here, before. "You...turned her into an inanimate object?!"
"She's doing a much better job of just selling products, now. Maybe if you hadn't informed her about what happens when you contradict me, this wouldn't have happened." Joanna bit her tongue to keep herself from blowing up. Her mom had truly gone mad with power. "That reminds me! How do you feel about using that milking machine?"