Take a closer look at Buster Girl('s exhibit).

Break Girl circled around the life-sized model again, enjoying checking it out from multiple angles. "She really is my sister model, huh? Our personalities couldn't be more different, but otherwise, we're so similar... I wonder how close this model is? Could I... actually use it for comparison?"

Break Girl moved the model's arms to its side and stood back-to-back and hand-to-hand with the display piece. She felt the cheeks of her own backside press against the soft skin of the fake Buster Girl's ass... It was all synthetic, of course, but the model's seemed no less real than any other robot's. Their bodies were nearly identical. "L-Lining up like this after getting a look at that booty is making me think mine might be a little big, too... How about these?"

Continuing to satisfy her curiosity, the heroine moved to the front of the display and pressed her own sizable tits against the Buster Girl model's, squishing them together in a pleasant sandwich only she was present to see. She glanced down into the valley of their combined cleavage, feeling her face redden slightly. "We're both pretty big, huh? Now that I think about it, it was kind of weird of Dr. Dolly to try and model a unit designed to take out Buster Girl specifically after Buster Girl herself, wasn't it? I wonder if we're focus tested to be the average 'type' of the Robot Mistresses... o-or maybe Buster Girl is a narcissist? No, wait, the easy explanation is that we're just Dr. Dolly's type. Ha ha..."

The key similarity that united her and Buster Girl was the special weapon that only the two of them possessed. Just having that bound them to a certain destiny, she thought, when it came to the other Robot Mistresses.

Actually, now that she thought about that weapon... That was one point she hadn't compared yet, wasn't it?{if Toy Mode = true} Buster Girl's to-scale Girl Buster was right there on her arm, begging to be measured... When Break Girl put her own arm next to it, she wasn't surprised to find they were the same size, but she was surprised to find she didn't feel satisfied. "I guess there's no way a fake display Girl Buster would be as impressive as the real thing... Buster Girl's real Girl Buster..." The distracted heroine found herself thinking about it, how it had almost been put inside her at the start of all this... "Th-that could have gotten dangerous, huh? I mean, I'm not a corrupted robot mistress like the others, but I still have no idea what would happen if she... did that. Hmm... P-Pretty crazy to think about! I mean, how would it feel to... have that in...?"

The robot gulped, alone with her dirty thoughts and a life-sized recreation of the Girl Buster, with none of the function, but the same suggestive shape...

With a guilty glance both ways, Break Girl snagged the weapon from the arm of the display doll, her breathing accelerating and her face beginning to flush as she tentatively rubbed it against her still-clothed undercarriage. "Oh gosh... Oho... Oh, wow... It's pretty big, b-but, uh... maybe I'd call it 'just right,' after all... B-B-Buster Girl and I... Really are the perfect fit for each other, aren't we? Uhehehee..."{endif}{if Futa Mode = true} Buster Girl's to-scale Girl Buster was, amazingly, a part of this model. She was sure it wasn't articulate, if she was to pull it out, but the size, at least, ought to be right? Gulping, Break Girl slowly pressed her body even more tightly to the doll. Soon, not only their breasts were touching, but also, the poles of their lower body weapons. Break Girl immediately gasped at the sensation, finding her Break Girl Buster far more sensitive and aroused by the contact than she'd expected. "O-Oh woah. Oh gosh, this is... w-way more exciting than I'd expected... Geez, get it together! What about the size?"

As she finally got her head together to do what she'd planned, she decided the sizes were the same. As expected.

"Well... That's enough fantasizing about it. You're the same size everywhere. Two robots made to fit each other... Made to... fit..."

Break Girl's eyes widened and her face flushed even harder as she got an even naughtier idea. Before she could second guess herself, the robot had turned around and begun rubbing the shaft of the model between her butt cheeks as she let out low moans, desperately wishing it was a lifelike model instead of a suggestive lump beneath the lifeless model's leotard. Still, shutting her eyes, she could use her imagination... to picture Buster Girl, getting into it from her shamelessly horny grinding, now lining herself up...{endif}

As the gasping girl-bot was considering taking her experimentation even further, the elevator door behind her dinged and opened. With a shriek, she guiltily hopped off the model toy she'd been playing with. "Holy moly!! I g-got way carried away! Mind out of the gutter, Break Girl! Once you've defeated Magnet Girl and thwarted Dolly's plot, there'll be plenty of time to learn more about Buster Girl..."

Slapping at her flushed face as if she could somehow cool it down, Break Girl left the model behind and headed for the elevator.