As I said, I got this idea from the comic Rolling Buster and Rolling Buster 2. Go check it out and tell 'em Sinful sent ya.
Roll was moaning before she even woke up, the feeling of Rock's tongue probing into her pussy sending small waves of pleasure through her body. She woke with a smile, her legs locking around Rock's head as his skilled tongue pushed deeper into her. "Rock~" She moaned, squirming on the bed as she enjoyed the feeling of his tongue stirring her insides.
Rock had memorized all of Roll's sweet spots from their previous times together. They were together at least once a day when Rock wasn't out saving the world, it had been one of Roll's rules, as she was always afraid she would lose her brother during one of Dr. Wily's attacks, and wanted to enjoy every day he was around. He, naturally had bee happy about this to, though he seemed to take more pleasure in pleasing Roll.
They were both thankful that Dr. Light had built them to be, to put it cleanly, anatomically correct. He had never mentioned it directly, but they got the sense that he had wanted them to be able to interact with humans, or in this case, each other, if they so desired; that way they could enjoy life just like they were any other normal humans; same reason they could sleep and eat.
Being normal had gone out the window when Rock became Megaman, but they could still enjoy each other. Roll gripped Rock's head, groaning as she soaked his face, cumming. "Morning~" She purred happily. "Morning~" Rock said back with a smile, licking his lips of her juices, "So sweet~" He said, starting to lick her pussy again. Roll moaned, but pushed his face away now, "Come on Rock, it's your turn~"
Rock chuckled, getting on the bed and laying down. Roll shifted over, pulling Rock's pants down to free his member, licking her lips at the eight inch stiff rod. She stroked it gently, opening her mouth and leaning forward, eager to return the favor to her brother, and more importantly, to taste the result, only for their fun to be interrupted by an explosion from another room in the house.
Rock, always ready for such things, jumped up off the bed. His pants were back up and his armor forming around his body before he landed in front of the bed, running out of the room. Roll ran out after him, wanting to see what line up was attacking them now so she could know if Rock would be able to be done with them by the time she had dinner ready.
But when she got down to the front room, or at least the ruble filled room that had once been their front room, Rock wasn't fighting off one of the Robot Masters or bantering with Dr. Wily. His armor had been removed forcefully, as well as his normal clothes, leaving him naked. His hands were tied behind his back, and he was on his knees in front of a tall woman.
She was a robotic woman, Roll saw. She looked normal enough, quite beautiful actually, with long slender legs, a round firm ass, sizable bust, and luscious platinum hair, all of which put Roll's to shame, at least as far as Roll understood. She was wearing silver FBMs and a long high cut black dress with cuts in the chest that left just enough to the imagination. Only another robot would be able to tell she was one as well on sight.
"Who are you?" Roll questioned. She smiled, "They call me Sex Queen darling~" She said, snapping her fingers. On cue, seventeen other robotic people entered the room through the massive hole in the wall, and Base with them. Roll was confused on many levels, and didn't understand what was happening.
Seeing the confusion on Roll's face, Sex Queen giggled, "Dr. Wily built me. Put a lot of his best resources to, guess he built me to last. Not sure what he built me for, but it might have been a good idea for him not to add free will. I didn't really see the point in following his orders and battling Megaman when he looks positively delicious~ so I figured I'd keep him for myself. Base here saw me and knew who was best to follow."
Base picked up the bound Rock and carried him off, the Robot Masters stopping Roll from following, "I kicked Wily out and used his machines to put together these beautiful boys and girls. I call them the Fetish Masters. We're gonna show that war is one way to take over the world, but enslaving through pleasure is much more fun~ sorry I can't take you with hun, you just don't have many useful assets for us."
Roll blushed deeply, looking down at the body. She looked over the Fetish Masters. Finger Man, Oral Woman, Anal Man, Futa Woman, Cuntboy Man, Bust Woman, Tentacle Man, Toy Woman, Dom Man, Sadism Woman, Beast Man, Submission Woman, Gangbang Man, Masochism Woman, Furry Man, Feet Woman, and Bondage Man. Roll had never seen robots like this, even the market bots designed for sex weren't built quite so well, and unlike the Robot Masters, Roll couldn't tell on sight which one's skill would defeat the other.
Sex Queen and her Fetish Masters left with Rock as their sex slave, Roll unable to do anything to stop them. Dr. Light was away, which may have been why Sex Queen had chosen to attack at the time.
No, Roll thought, she wasn't gonna let this happen. Rock never let the Robot Masters hurt her, she couldn't let this Sex Queen lady take him. She ran to the lab, looking around frantically. It didn't take her too long to find the VWS, varied weapons system, that had been built in case Rock's were ever damaged. She took the device out and placed it inside the upgrade machine that Dr. Light used to fix up her and Rock.
Usually all Roll got in terms of upgrades were minor things to make her more durable and her mind sharper. Now, now she would have the very same device that made it possible for Rock to be the incredible Megaman. She turned the machine on and stepped inside, holding her breath as it upgraded her. She didn't feel anything more than a gentle tingle, but she knew she upgraded now. All she had to do was find the weakest of the Fetish Masters and defeat them, and she would gain their power.
But where should she start?
I already have my own idea of the Fetish Master order, but I'm more than willing to change the order up if you guys can think of a better order for it to go through. I listed all the existing Fetish Masters out, and I think their sexual skills are quite evident by their names, so tell me, where do you think Roll should start, and who should be weak to them?