It was two days before Draco cracked. He had to know how Ginny had known, this belief shattering revelation was making him, feel like he'd been hit with a confoundus and he was sure the others felt the same. He'd seen them sneaking slightly disbelieving looks at Hermione then shaking their heads as if trying to convince themselves it was all a ruse. And he certainly wasn't making good on Ginny's bet if this was a set up. After dinner he attacked.

"Truth or dare" he said summoning the shot glasses and fire whiskey once again "who's in?" He added looking around the table with a glare that said they had better damn well all be 'in'.

"Alright" Hermione replied shooting him a searching look. He waited twenty minutes before he pounced

" Hermione, truth or dare?"

"Truth"

"What did you and Luna do the first night here while the rest of us were busy?"

Luna and Hermione looked at each other suppressing giggles whilst Blaise and Theo ears suddenly perked up.

Hermione turned her gaze back to Draco, meeting his eyes dead on "truthfully, we fucked" she deadpanned.

she turned to Theo, "truth or dare?" She asked one eyebrow arched.

Theo gulped. "truth" he said hesitantly

"you all already knew the answer didn't you?"

"Yes" Theo admitted a bit sheepishly "Ginny made a bet with us and showed us on the mirrors" his Slytherin tendencies for self preservation kicking in. whilst Ginny's bat-bogey hex was famous, Theo had not forgotten the little speech Hermione had given two days before.

Hermione just shrugged nonchalantly "I know"

Theo, now even more unsure cast around wildly for a moment looking for backup from his friends before his every zoomed in on Ginny

"Ginny, truth or Dare"

"Since you boys clearly have this planned, I may as well pick truth and get this over with."

"How did you know?"

"It's a common enough occurrence" she replied airily, Before turning on a shocked Blaise.

Blaise picked dare, but when he chose Luna for the next go she chose

Truth.

"How many times?"

"Oh, I don't know, 'Mione, Gin, what do you reckon" the girls looked at each other and shrugged, Hermione clearly tallying in her mind answered, "maybe two dozen? Unless you two have met up since I moved here"

The boys were even more stunned now.

"Wait, wait, wait" Blaise stammered "Weaslette as well?"

"Of course" Luna replied.

"Alright forget whose turn it is, full story now" Blaise demanded.

"Well sometimes it's all three of us, and sometimes various pairs" Luna offered

"How?" Draco managed to splutter

"What, the Slytherin sex God needs a sex ed lesson?" Hermione joked "I know that Hogwarts neglected to even cover the basics but surely you of all people can figure it out for yourself."

Draco snarled, "that's not what I meant Granger" he bit out through clenched teeth. " how, did this first happen?"

"Oh" she replied feigning innocence "that. Slughorn's Christmas party" she shrugged.

"Wait up". Blaise cut in, "I was at that party and I do not remember you three snogging and certainly not anything more than that."

"Well. Fine, strictly speaking it was in the room or requirement, but Slughorn's party was the catalyst. Harry had ditched to follow you" she said pointing to Malfoy "leaving Luna dateless, I was sick of trying to hide out from Cormac the human octopus McLaggen and Ginny was determined not to waste a pretty dress. So we snuck out a couple of bottles of elf wine and some trays of snacks and went to the room of requirement. There was lots of giggling and wine and imitations of Cormac's attempts at seduction, and well, then we were kissing, and the room provided a bed….."

"That was a fun night" Luna chimed in airly.

"So then occasionally when the boys were being idiots we'd tell them that we were going to practice DADA and head off to the room, sometimes all three of us, sometimes two. Over the summer Ginny and I share a room anyway and Luna lived just over the hill."

Ginny picked up the story "in sixth year, before Luna was kidnapped she and I spent a lot of time there. I'm sure you all remember what that year was like and the need for comfort. Then after the war Harry was back and 'Mione and Ron were together and Luna was dating Ernie so we didn't use the room much, but there were a few times."

"Do Potty and Weasel know?" That was Theo.

"Ron, Merlin no!" Hermione laughed "I think he'd have a heart attack, despite the show he and Lavender put on in sixth year he's actually quite conservative"

"Harry knows, but he's certainly not going to tell Ron" Ginny said. "They have a strict don't ask don't tell policy being that Ron is my brother. Though as 'Monie said, he's not one to share your more interesting experiences with. He doesn't know how the twins used to pick up witches either" she added with a wink.

"Can we get back to the game now?" Luna inquired. "I've got a good dare in mind.

Just when the girls thought that the boys had dropped the subject at least for the night, they struck suddenly like the snakes they were. Hermione had picked dare. "I dare you to give us a demonstration" Blaise said with a smirk.

"A demonstration of what?" Hermione replied pretending she didn't know exactly what he meant.

"Of what happened in the room of requirement when you girls were there alone"

With a sigh and an eyeroll and a few mutinous thoughts about boys and their fantasies Hermione turned to Ginny and Luna, they held a silent conference with their eyes before Hermione took their hands, drew them over to the middle of the lounge area and they proceeded to put on a show the Slytherin playboys would never forget.

After a few minutes they seemed to forget that the boys were watching and started to get carried away. muscle memory helping hands and mouths and bodies to move to all the right places despite it having been years since they had last done this. Theo, Draco and Blaise sat in shocked awe, subconsciously licking their lips or adjusting their pants until Luna suddenly spoke "you can join in if you like" she said her faie voice vibrating slightly as Ginny licked up the side of her neck. With a "Hell yeah" glance between them the boys shot out of their seats like they'd been hit with stinging curse, and zeroed in on the girls, undoing buttons and clasps to expose more of the girl's flesh to each other. At some unseen signal the girls suddenly pulled back from each other. They looked at Draco, Blaise and Theo, Ginny bit her lip and sighed. "On second thoughts, this is just between us girls" she grabbed the others hands and they ran down the port stairs to Ginny's cabin. Draco, Theo and Blaise stood shell shocked for a second. "Dammit, that was going to be the best thing ever to happen ever" Theo moaned. Sighing he started towards the starboard stairs, "I guess I'll just be in my cabin then making do with the imagery."

"Wait, image, that's it!" Blaise cried. Theo and Draco looked at him in confusion. "The mirrors!"

The other men's eyebrows shot up as compression dawned, and suddenly they were each sprinting to their respective cabins.

Draco, having the bridge deck cabin arrived first. He tapped his wand to the door and swiped it in a circle to activate the mirror tapping the corner to find Ginny's room. "Oh yeah" he said as the mirror filled with the image of Hermione and Ginny snogging, he could hear breathy moans and gasps. Spinning his armchair around to face the mirror he sank into it and started to unzip his trousers, just as he slipped his hand beneath the waistband of his pants the moans started to change, the voices were getting deeper, peering at the mirror he noticed Ginny's image was changing too, her hair was shortening and her face was widening until rather than Ginny and Hermione his mirror was showing Ron and Hermione snogging. "What the hell?" He murmured confused, "ugh, look at that terrible technique" he shrank away from the image until he noticed it was changing again, this time Hermione was changing, hair shortening and darkening, jaw filling out, glasses appearing. Wait, glasses. "UGH!" Draco cried jumping from the chair and tapping the mirror off, before storming back out to the saloon.

Theo was the second to reach his quarters, one hand already undoing his pants as the other activated the mirror. "Oh Ginny, I just love how you stroke my pussy" he heard Hermione mewl, but there wasn't any picture. "Crap, where's the picture?" He complained "show me the damn picture" he yelled at the mirror hitting it with his wand. Slowly an image started to appear, fuzzy at first, it seemed to be Luna's back, her voice ringing out clearly "mmm that looks like it feels so good Ginny". "Move out of the fucking way Lovegood!" Theo cried desperate to see what Ginny was doing. Suddenly Luna did move, to reveal Ginny and Hermione sitting on the bed, fully clothed, Ginny patting Hermione's cat crookshanks. "Ah what!" Theo yelled, "you have got to be fucking kidding me." He added throwing open the door and storming up the stairs.

Blaise slid into his cabin and slammed the door, immediately tapping it in the pattern Ginny had shown them. "Holy mother of Merlin!" He breathed as the image in the mirror cleared to show the three girls, in their underwear having a pillow fight. He sank back onto his bed staring at the ceiling and taking a moment to send prayers of thanks to every deity he could think of. He pulled the buttons of his trousers open and shoved them down his legs, shimmying back to lean up against the headboard, as he glanced back at the mirror the image suddenly changed. Instead of three hot girls having a sexy pillowfight, his eyes widened in shock then clamped shut as he tried to erase the new image from his mind. It was too late, burned onto the back of his eyelids was the image of Voldemort, Snape and FIlch all dressed in women's underwear, pillow fighting. "YEAGHH!" he yelped "make it stop" and with a hand over his eyes, he desperately lunged forward stabbing his wand toward the mirror, and tripping over his dropped trousers as he scrambled off the bed. When the horrible anguish finally stopped, he yanked his pants back up and stomped out of his cabin. In the saloon he found an equally disturbed looking Draco and Theo, the former holding up a note "Gotcha you pervs" it read in letters that changed colour, flashing with little fireworks and laughing faces.

AN: Please let me know if you want me to write the girls (Hermione/Luna) outtake, or the Yule Ball scene, or Riverfire Party bet-payup scene.
Or if you want a version of chapeter one with slash... you know for science.