Exhausted from the sex, Splash Woman grabbed her trident to fight back against the blubbery robot, but it was already too late. Roll was running at her like a stampeding hippo, her eyes glowing read as she moved all seven hundred pounds of metal and fake fat at the robot villain. Splash Woman thrust her trident out to impale the obese robot, but Roll’s body saved her.
As the Trident headed for her heart, all of Roll’s fat suddenly rippled and shifted around. Her ass deflated, he puffy cheeks became hollow, her legs were sticks and her gut receded back in, but her breasts reached sizes never before seen. Her dress was blown apart as she grew the biggest breasts in the world. They were as big as Splash Woman each if not bigger. Perfectly round, smooth tits that were taller and wider then Roll’s body. Splash Woman gapped at the giant titties, which were all she could see rushing at her. Desperate, she lashed out with her trident, but when it hit the double Z-cup breasts it snapped like a toothpick.

Roll was still rushing towards her, even though her breasts were dragging on the floor, and with a loud smack, she ran right into Splash Woman. The villain screamed as she was thrown to the ground. She looked up and got another scream out as the giant boobs fell on top of her. With a crash, Roll landed chest first on Splash Woman, burying the robot completely under her tit-flesh except for her wildly waving tail. Roll just laid there for a second, feeling Splash Woman squirming against her giant breasts. Roll hated to admit it, but it felt kind of good squishing the villain against her giant boobies.

“Roll?” A very shocked and confused Mega Man stuttered as he lifted his head to watch his sister crush his lover under her breasts. Roll was lying on her breasts like they were beanbag chairs. Her body looked exactly the same except with her chest. She was back to skinny, normal Roll, which Mega Man found as both a relief and a disappointment.

After what Splash Woman had done to him, his mind was trying to process everything that had happened, but was lagging because of several things. Whatever Splash Woman did with him involving the antenna between his legs and the hole in her crotch felt amazing and he wanted to do it again with someone, it didn’t matter who. He also wanted to see more of those breast things and try having his face sat on again since this time he thought it would be different. He didn’t know if Splash Woman was the only robot to have a hole like that, but if other robots did he wanted to stick his antenna in there again. What his mind kept going back to was Roll's bigger body and what putting his antenna in her would be like. He imagined good and he wondered if she would let him. Its too bad Roll didn’t know what her brother was thinking or she’d be even more happy then she was now.

“Hold on bro. I’m okay, just give me a second to…” grunting, Roll tried to lift or shift her chest off of Splash Woman, but it was just too heavy. She had momentum on her side when she ran with them, but now that she was lying down she was stuck. Her feet and arms couldn’t even reach the ground, they just pushed against her breasts. Wishing that all her weight hadn’t moved to her chest, the rippling sensation returned and the fat was moving again, this time downwards.

A loud moan came from Roll as her ass and legs ballooned out as her chest deflated. Splash Woman was freed from under the smooth, soft breasts only to find Roll’s ass expanding quickly over her chest. She got about five seconds of sunlight before robotic ass flesh covered her face. Roll's thick, wide thighs waved in the air as her butt grew. Her legs were thicker then ever, solid pillars of white, jiggly fat, but it was her rear that got the most fat. Big, fat cheeks pooled out on the floor, covering all of Splash Woman this time, even her tail. Having the villain under her ass, Roll sighed. “That’s better.”