*** A few days later ***

Hermione wandered into the girls' toilet. She needed to pee, even if it meant disobeying Luna's orders and cleaning herself up. They'd been having pretty regular sex since their first time - and Luna was getting pretty good, too! Almost always lasting longer than Hermione, and learning to have enough control to make her squirt, it was by far the best sex either of them had ever had. It was a second sexual awakening, and it had sent both their libidos back into overdrive after a few weeks of relative abstinence. Permanently banned from wearing underwear, Hermione arrived at most classes with cum either running down the inside of her leg, or sticking her shirt to her back in the rare instance that Luna pulled out. It was a miracle no-one had said anything.

"Hey, 'mione!"

"Oh, hi Ginny. How are you doing?"

Ginny glanced knowingly at the trail of glistening spunk on Hermione's inner thigh. "About as well as you."

Blushing, but not bothering to cover herself up, she replied: "What does that mean?"

In response, Ginny turned and lifted her skirt above her arse, revealing splotches of semen all over her lower back, butt and the inside of her skirt.

"You've been with Harry?"

"No, Luna. Same as you?"

"Yeah... But we do it at least once a day, often two or three. How on earth does she have the energy for both of us?"

"Merlin only knows. She's probably just got really good at the recovery charm. But I'm not complaining, its the most satisfied I've been in ages. She's really good at it!"

"I know! I didn't think I enjoyed penetration, but she's so smooth... hmmmm..." She sighed, thinking about Luna's cock sliding into her, pressing on just the right spot.

"Hey, so listen. We haven't done anything... together for a while. I love being filled like a whore as much as you do, but I also miss what we had over summer. Just us. Are you free later?"

Not expecting this outpouring of attachment from the girl who told her she was just a live sex toy, Hermione stumbled over her answer. "Um... yeah... I'll, I'll... I'll be around later. Assuming Luna doesn't grab either of us first!"

"Cool. See you later then."

"Yeah, see you later."

*** That night, in the girls' dorm ***

"Oh, yeah! That's good! Right there...!" Ginny whined as she lay beneath Hermione, their bodies pressed as tightly as possible while they touched each other - desperate to cum, and desperate to prolong their edging. Both girls diligently rubbing the other's clit: Ginny liking the tip gently flicked, while Hermione preferred wide circles. They moaned and sighed together, bucking hips as random bursts of electricity shot up their bodies. Feeling Hermione's juices flow down her finger, Ginny made even more of an effort to pleasure her.

"Oh! Uh... uh... I'm gonna cum!" Hermione moaned through jagged breaths. Feeling the wave of intensity crash over her, she thrust her hip forward, and screamed into the pillow while she quivered uncontrollably. Trying to still finger Ginny, but eventually giving up, she rode out her orgasm - forcibly removing Ginny's hand as she tried to keep going beyond the point of pleasure. Ginny relented, allowing her friend to recover for a moment as she licked her fingers clean and placed her hand on Hermione's head, cuddling her.

"I'm not waiting until morning for you to make me cum this time!"

"I wouldn't want you to." Slowly catching her breath, she placed a hand on Ginny's cheek and kissed her.

"Are you going to give me one of your famous licks?"

"Famous?"

"I've been talking to Luna," she smirked. In tacit response, Hermione moved down her friend's body, grabbing her hips to move her to the edge of the bed. Getting on the knees on the floor, she began her work: slowly lapping up and down Ginny's slit, moving her labia aside with her tongue. Eventually, she spread Ginny's lips with two fingers, and closed her mouth around her clit - sucking gently as she did so. Exhaling deeply, Ginny felt her warm cum ooze out of her pussy, and she placed a hand on Hermione's head as she adjusted to the stimulation. Gradually increasing the speed of her flicking tongue, Hermione felt Ginny tense and heard a slight moan, encouraging her to keep going. A couple of minutes of intense, focussed tonging, and Ginny could hold on no longer, grunting as her legs shook around Hermione's head, her back arching back as she wrestled with her own body to keep her clit on Hermione's tongue. Shuddering to a halt, she pulled Hermione away from her sensitive area, and leant back onto the bed, taking her friend with her and they kissed, enjoying the sensation of skin-on-skin - they were satisfied. At least for now.

*** Meanwhile, in the shower next door ***

Luna dropped her skirt, enjoying the sight of her cock dangling between her legs. Cho was in the first shower, but the condensation on the glass door prevented them seeing each other properly.

"Hey Cho!"

"Hi, Luna!"

Luna stepped into the neighbouring shower and turned on the water. She began washing herself, rubbing all over, in love with her own body.

"Um... Luna?"

"Yeah?"

"I wanted to say sorry. For over reacting the other day."

"Oh, it's okay. I don't think you over reacted. We're the ones that should be sorry."

"I was just shocked, that's all. I've never really done much, only with Cedric..."

"You haven't been with anyone since?"

"I thought I might get with Harry, after we kissed. But as much as I wanted it, he clearly loves Ginny. Which was another thing that surprised me: I didn't think Ginny would cheat."

"Oh she isn't. Harry's fully aware. Actively encourages it actually, since they can't always satisfy each other."

"Oh. Anyway, once I got over the shock I realised that it was clearly just me who was missing out. And I'm just trying to tell you that I get it, and I'm not mad and if you want to use the dorm, its fine. As long as you clean up."

"Cho, that's very mature of you. You know, you don't have to miss out?"

"What do you mean?"

"We'd all be happy for you to join our little group."

"I'm not gay."

"I don't think Ginny is really gay, just a bit curious. Hermione seems bi."

"I'm still not attracted to girls. At all."

By now Luna was sporting a semi, and slowly masturbating as she imagined Cho riding her, perhaps while licking out Hermione.

"Can I tell you a secret?"

"Sure."

"I've been practicing transfiguration. And I gave myself a penis."

"Ew! What?"

"It seemed right. And it means that if you did join us, it wouldn't technically be gay."

"Um... I... don't know. I don't think of you like that."

"I know. But that's the great thing: we don't have to be involved with each other. We just have urges that need satisfying, so we do it together because its more fun. Then we go about our days as normal. No strings attached."

"How can you do that?"

"We just need sex, then we have sex, then we pretend like nothing happened. It's not complicated."

There was a long pause as Cho considered what Luna had said. Luna stood, slowly wanking, wondering what was going through Cho's mind. She knew it probably wouldn't work, if only because Cho was actually straight. And still pining for Cedric and Harry. After a minute, a quieter reply came:

"Do you need sex now, Luna?" Jackpot!

"I can do it myself, but-" Cho suddenly appeared in front of the shower door, opened it and slowly walked in, her eyes widening as she took in the image of her friend stood facing her, rubbing a huge cock. Wordlessly, Cho sank to her knees, grasped Luna's dick at the base, and took the tip into her mouth. Gradually working it in and out, she used one had to massage Luna's balls and the other to grab her arse. Surprised by the vivacity of her new sexual conquest, Luna gasped and placed a hand on Cho's head - gently guiding her. Enjoying herself more than she thought, Cho began sucking and using her tongue to lick around the circumference of her friend's member - feeling it twitch in her mouth.

"Why don't you touch yourself?" Suggested Luna. Cho looked up at her in response, clearly a little embarrassed. But, she moved her hand down to her pussy as she continued her attempt to pleasure Luna. She closed her eyes and gently touched her clit, squeezing her hand between her legs, not wanting to show anything. Using three fingers and moving her whole hand, she rubbed herself in small circles, trying to concentrate. After thirty seconds, she removed Luna's cock from her mouth as an orgasm caught her off guard. Scrunching up her face, she almost silently shook as she rubbed herself through her climax, which quickly receded. Returning to Luna's cock, she took on her duty with a new energy, sucking and wanking until she gently cupped her balls, and Luna could hold it no longer. Grunting and exhaling, she felt her orgasm build; she moved Cho's mouth off her. Cho continued wanking, making Luna explode: her cock twitching violently as she fired ribbons of hot cum all over Cho's face and chest. She kept cumming, shooting four, five, six loads, involuntarily thrusting her hips slightly with each. Sticking her tongue out, Cho flicked it lightly over the tip of Luna's cock, prolonging her climax and teasing out every last drop of semen. Swallowing whatever was on her tongue, Cho remained squatting beneath Luna's slowly softening cock. Luna broke the silence:

"Did you enjoy that? You came, right?"

"I... don't know why I did that..."

"Did what?"

"That... sucked you off, touched myself. I don't know what I was thinking."

"I needed an orgasm, you needed an orgasm. Problem solved."

"Yeah... I did." She let go of Luna's dick and stood up. "I think I might go. I need to think about this..."

"Sure. I'm sorry if you felt pressured..."

"No, it's alright. I wanted to. I just don't know why." She turned and left, grabbing a towel on her way to the bedroom.

Walking through the door, she was greeted by Hermione and Ginny looking slightly sweaty and glazed over, cuddling naked in one bed. Jumping in horror, Cho held the towel up to try and cover herself, but it was too late. They had seen the nude girl emerge from the shower, embarrassed, and cum obviously dripping down her face and tits.

"Cho...?" Began Ginny.

"I'm sorry! I don't know! Why...!? Ugh! I'm-I'm going to go." She stammered, quickly wiping Luna's orgasm from her face and trying desperately to put some clothes on. Finding some jeans and a top, she notably forewent underwear and left in a hurry.

"What just happened?" Asked Ginny.

"If I were to guess," replied Hermione, "I'd say she finally decided that Luna's cock is better than no cock."

"Don't blame her! Luna knows what she's doing! Speak of the devil!"

"Hi... did you see Cho?"

"Yes, Luna, of course we saw Cho! She came out of the shower looking bewildered and... um..."

"Satisfied?"

"You look satisfied! She looked like she'd had something to do with that?" Accused Ginny.

"I asked her if she was interested in our little secret club. She said she was straight, I told her I had a penis, then she sucked me off. She was actually really good! Definitely had a lot of practice." Luna began drying herself off, cleaning the spunk from the end of her dick.

"And!?"

"That's about it. She touched herself, but it was only a little quiver. I think she just wanted some kind of contact."

"Do you think she'll be back for more? Or maybe you'll share her this time?" Asked Ginny.

"Probably." Luna climbed into bed, "I think she's just as horny as we are."

"And how horny is that?" Hermione enquired.

Luna immediately felt her cock hardening again. "I could do to fuck one or both of you..."