CAUTION! This is a major Riffgenta smut, so if you're not into that, go away! But to the rest of you, enjoy!

PS, I do not own in anyway shape or form RHPS.

"Riff! Ve can't! Not here, not now..." Magenta said slightly pushing Riff Raff away from her. He only got closer.
"Don't resist my darling! It's too good to resist! I know you love it" he pushed her against the wall, kissing down her neck onto her chest and then back up again.
"Oh but Riff, vat if the master..." Magenta started.
Riff cut her off "Psssh, the master is in bed with Columbia! You know he won't be out for hours!" He run his hands down her back, and he squeezed when he got to her rear.
"Ohhh!" Magenta screamed. As much as she knew it was a bad idea, she loved it!
She sighed, smiling, accepting defeat. "Fine Riff. Come to my room."
They did the Transylvanian sign, and they ran hand in hand to the elevator. He kissed aggressively and she let him happily. She laughed with enjoyment.
They ran to the room. Magenta jumped on the bed, and sat up on her knees. He pulled off her domestic's uniform hastily, and she retorted by pulling down his pants. She grabbed his underwear and pulled him down on top of her.
She slid underneath him, pulling off his underwear as she went, until she was directly under his... Ahem... Lovely bits. She laughed again, happily. She kissed his inner thighs and he grabbed the bed-frame.
"Good love?" She asked looking up.
"Uhh huh!" He said, obviously loving it.
Then she slid back up. She undid her bra and he pulled it off and threw it to the ground. Then she squirmed taking her panties off. Then she grabbed his shoulders.
"Go." She whispered.
And he did. Slowly and gently thrusting inside of her.
"FASTER RIFF FASTER!" She screamed in absolute pleasure.
So he sped up. She moaned and yelled his name, and he just but his lip, taking her all in.
Then just as Magenta was really starting to orgasm, the door flew open.
There was Columbia and Frank, naked in the doorway. Magenta hid under the covers and Riff tried going in too, but didn't quite get there before his master said...
"Huh. I thought you two were secretly doing incest." He smiled.
Magenta came out from the covers meekly.
"What's incest Franky?" Columbia asked, confused.
"Oh you're so innocent darling" he said grinning, tickling her under her chin. She giggled. "It's when two family members have sex or kiss or things like that"
"Ve're really sorry master. Ve promise ve vill never do anything like this again!" Magenta pleaded.
"Please do not punish us! And if you must punish, do not punish her! She knew it was a bad idea, I pushed myself on her!" Riff begged.
"Good god. You don't think I have anything against this do you? Go right ahead and get dirty together! I don't care!" Frank smiled walking towards them. "I'm finding it quite pleasurable actually" he smiled, sitting on the bed.
Magenta blushed. Columbia ran up and sat on his lap.
"Now what I do have something against is not letting me in on this sexual family action you had! I never asked to have orgies with you cause I thought it might be uncomfortable for you! But now... Now I know I can! In fact..." he held Columbia tighter around the waist "Right now would be a lovely time to try it." He looked at Columbia. "Are you in?"
She smiled and nodded excitedly.
"Will you relieve my tension you sexy incestuous siblings you?" He bit his lip at them, waiting for an answer.
"Ve do as we are told master." Magenta smiled. She was fine with this.
"It is our pleasure." Riff said. He was NOT fine with this. He was happy his master accepted his love of Magenta, but sharing her was not what he wanted. But he had no choice. He had to serve his master.
That is when he started thinking up a plan.