Buster Girl is defeated by Red-Hot Heat Girl!

"No... No more... I can't keep this up..." Buster Girl huffed, feeling like her Dolly-engineered sweat glands were finally giving out. It felt like she was going to perish from dehydration, despite robots needing no hydration to keep working. In reality, her internal circuitry had been pushed to its limits. Even if her flesh didn't melt off, there was only so much heat that her insides were designed to take... Just as the Robot Mistresses had **** internal points, no robot's internal mechanisms were 100% resistant to ridiculous temperatures like these. "I can barely move my body now..."

Heat Girl approached through a waist-level smattering of flames, her soft belly pushing through along with her chunky hips. Upon her face was a sympathetic smile, with her eyes gently closed and one hand resting on her cheek. "You fought so hard, Buster Girl. I wasn't sure if I was going to be able to keep up with a young girl like you, but it's nice to see that I can still get the job done when push comes to shove. Humanity doesn't need you to save it, Buster Girl... Once everything's under Doctor Dolly's control, life will be so much simpler for all of them! No more bad, rebellious children... everyone will worship Doctor Dolly and do what she knows is best," Heat Girl cooed, her green eyes flashing with an insane glow as they opened in eerie, thin crescents.

"Listen to yourself! You know that isn't right, Heat Girl! If you could just fight off the virus... we could fight Dolly together... and bring your children back!" Buster Girl protested, as the other woman came closer and began to wrap her arms around the injured fighter. "Aaagh! Hot, hot! Too hot!"

"Oh dear... Your pretty hair is so badly burnt. We'll have to get Dolly to fix that," Heat Girl giggled, running her hand through the silky, blond pigtails of Buster Girl. Where her hand moved, flames followed, causing Buster Girl to wail in panic. "Hm hm hm! You got me really hot and bothered during that fight just now. You wanted to do something naughty, right? I've decided I'll let you. I want it... I want that Girl Buster of yours inside of me. It's never too late to try new experiences, right?"

"I really wish you'd told me before now," Buster Girl grumbled, knowing she didn't have enough left in her Plasma Battery to fire a single shot.

"Don't worry... Mommy will handle every bit of it," the chubby Robot Mistress cooed, parting her legs and grabbing hold of the Girl Buster to fit it between the waiting, meticulously articulated lips of her robo-pussy. "Mmm... Isn't it a little big? It doesn't suit a cute girl like you." Before Buster Girl could answer, Heat Girl began to wiggle her way onto the head of the weapon. "Oh! That feels good... I didn't realize how much I'd been craving something like this!"

If the Day Care was an oven now, the inside of Heat Girl was like a welding furnace! "W-Wait! Pull it out! It's melting!" Buster Girl panicked, clutching her head with both hands. Sure enough, no sooner had the Girl Buster entered past the lips than the whole thing then a sickening hiss came from inside the girl's body. "Nooo!"

"Oopsie..." Heat Girl murmured lifting up her hips again. Molten steel dribbled out from the crevice between her legs; that heated metal had been Buster Girl's only tool to save humanity! Her smile fell into a pouting frown for a moment; she'd been looking forward to riding her former rival. "Don't worry. We'll get Doctor Dolly to build you a new, heat-resistant toy! But first... I'm going to need to get that virus in you." Greedily, the virus-infected teacher clasped hold of Buster Girl's lips with her own, causing steam to rise up from the point of their French kiss, intertwining her super-heated tongue with the other girl's.

Buster Girl found herself accepting it. The heat coming off the other girl was almost becoming comforting to her now... With each burst of heat, her robotic equivalents of "nerves" dulled, to the point that all she could feel was a dull warmth. Her senses weren't the only things becoming dull. Humanity's last hope, closed her pretty blue eyes, then slowly reopened them; they were dull with the evil doctor's trademark "DD" logo flashing in them momentarily.

"Good girl... Sweet, sweet girl~" Heat Girl smacked around the lips of her captive.