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When Billy Screwed Mandy	By : Jayrich Category: +G through L > Grim Adventures of Billy and Mandy Views: 26889 -:- Recommendations : 1 -:- Currently Reading : 3
Disclaimer: I do not own Grim Adventures of Billy and Mandy, nor any of the characters from it. I do not make any money from the writing of this story.

Chapter List
- 1-When Billy Screwed Mandy
- 2-WBSM 2
- 3-WBSM 3
- 4-WBSM 4
- 5-WBSM 5
- 6-WBSM 6
- 7-WBSM 7
- 8-WBSM 8
- 9-WBSM 9
- 4
- 5
- 6
(Author's Note: I know this is late, but this is the Halloween story I did about Billy & Mandy. Warning, it does involve Death. And by that I don't mean just Grim. LoL. Hope you enjoy...)

Billy & Mandy’s Halloween Horror Hunt
“Billy, stop your crying. You’re degrading yourself even more than usual.”
Mandy sits in bed next to a sobbing Billy. He’s been crying ever since Mandy broke the news about her business trip. In the past, she didn’t really care about him crying. In fact, at times she caused it. But now, she finds that she has feelings to console him…somewhat. Plus the bed was getting soaked with his tears. So, in Mandy’s loving way, she reaches over and smacks Billy across the face.
“Snap out of it, Dum-Dum!” She tells him. “You know I have to go over to Seattle to oversee my business ventures. Bill Gates has strengthened his army and is putting up a resistance.”
“But Mandy, you’re gonna miss Halloween.” Billy sobs.
“A stupid holiday where children dress up in ridiculous costumes and stuff themselves with Candy until they become Diabetic.” She says. “What’s there to miss?”
“But, I thought we would spend the Halloween together.” He tells her.
Mandy’s eyes widen in shock. Could Billy be showing signs of affection? Maybe even romance? “Billy, I…”
“I mean, who’s gonna hold my head over the toilet while I puke Candy until pass out.” Billy says, giggling wildly.
WHACK!!! Mandy delivers another smack across his face, as she wears an annoyed look. “Why did I even trust that thought?” She thinks to herself. “Look Billy, I’ll be back in two days, so I won’t be gone long. In the meantime, you can help out Grim with his Halloween decorations at his house tomorrow.”
“O-OK, Mandy.” Billy says, his voice cracking & breaking. “But…but I’ll miss you.”
Those words shock Mandy like 1200 volts through the body. He’ll miss her. She thought the only thing Billy was capable of missing was the point. But he is in fact showing signs of affection, and it makes her feel uneasy. “Whatever, let’s just get some sleep.” She says, rolling over to face away from Billy.
He rolls over onto his side and wipes the tears from his eyes…and the snot from his nose, as he closes his eyes. “Hey, Mandy…I love you.”
Her heart nearly stops once she hears him say that. Already she can sense feelings of affections for him rising, but she quickly uses her willpower to keep them down. “Just go to sleep.” She says coldly, but not nearly meaning it. And the two drift off to sleep.
The Next Morning…
Billy slowly wakes up from his slumber to find himself alone in the bed, and Mandy nowhere in sight. As he sits up, he finds a note duct taped to his nose, which reads: from the Office of your future Monarch, Mandy. He rips the note off of his nose and begins to read it.
“Dear Billy, by the time you read this I will already be in Seattle on my business trip. Grim will be around to pick you up shortly. Try not to bring about the end of the world while I’m gone…Mandy.” Billy’s eyes then light up, as he remembers its Halloween. “OOH! I gotta go try on my costume!”
He hops out of bed and rushes into the bathroom, slamming the door behind him. Just then, a black mushroom cloud appears in the room, with Grim stepping out of it. He looks around the room for a moment, then pulls back his robe sleeve and looks at his watch. “Where is that nincompoop?” He says, growing impatient. “I have a schedule to keep, ya know. It is All Hallows Eve after all.”
At that moment, Billy bursts out of the bathroom wearing a Red Leather Jacket with multiple zippers, skinny black pants, white socks and black dancing shoes. His skin is gray and looks to be rotting. Grim screams in horror once he lays eyes on him.
“EEEEEEEYYAAAAAAAAAAAAAAAAAAAGH!!!!!!!”
“Like it Grim?” Billy asks. “I’m a Michael Jackson Zombie!”
“Geez, man. Why’d it have to be that costume.” Grim says. “I had a bad encounter with that guy…and his nose. Now come on! We’ve got work to do.”
Grim taps the bottom on his scythe on the floor and the two are instantly transported to Grim & Eris’ home. Billy takes a look around the place. It’s a dirty, rundown, bug-infested hole-in-the-wall. “Wow, Grim! Your home is the nastiest, stankiest, disgustingest place I’ve ever seen!”
“Thank you, Billy.” Grim says, swelling with pride. “I try to make a good home.”
“I wish I could get my room this messy.” Billy is about to compliment him more before he notices someone off in a dark corner of the room. He stares mindlessly at the corner, until the person finally decides to step out of the shadows. It’s Nergal Jr., Billy’s half-mutant cousin. He’s dressed in a suit, much like the one his father wears. And wearing his trademark glasses.
“Hello, cousin.” He says.
“NERGAL JR.! Glad to see ya buddy.” Billy replies. “You here for the Candy?”
“Actually, he’s here to help you, dear Billy.” The three turn around to see Grim’s wife, Eris, the Goddess of Chaos, standing in the doorway.
“Yes.” Nergal agrees. “Father has suggested that I go out for Halloween to learn the spirit of the season.”
“And I suggested that he help get my humble abode looking like a horror house to start off.” Eris adds as she picks a box filled with Halloween decorations, before tossing it at them. “So you two get to work! Grim and I will be in the Living Room watching the View.”
“Oh how I love that Barbara Walters.” Grim says as he joins Eris in the Living Room, leaving Billy & Nergal Jr. alone. As soon as they’re out of sight, Nergal Jr. starts grinning evilly and turns to Billy.
“I’m glad you’re here Billy.” He says. “Because I have a fun activity planned for us.”
“OOH! Does it involve some adventure where we do something we know we shouldn’t and something evil possesses us and we go on some wild filled sex adventure filled with Hot Sex and Murder all which will probably end with Hot Sex in the Graveyard all because it’s Halloween?” Billy asks.
Nergal is shocked by Billy’s question. “Uh…maybe.”
“COOL!!!” Billy yells. “And is Candy involved?”
“I got something better than candy.” Nergal says, as a long black Tentacle emerges from the back of his head. It worms into the Living Room, past Grim & Eris, until it reaches Eris’ Golden Apple of Discord. It wraps around the apple and pulls back to Nergal, who offers the apple to Billy. “Here Cousin, take a bite out of this.”
“Wait a minute…” Billy says, taking a moment to think about the situation. “…That’s Eris’ Magic Banana. I can’t touch that, cause it’s got her name on it. See?” Billy points to a Giant ‘K’ that embedded on the apple. “K spells Eris.”
“But…it’s a capital K, Billy.” Nergal counters, hoping Billy is gullible enough to believe him. “And a capital K spells Billy.”
Billy takes yet another moment to think over the situation. “Hmmm…OK!” He takes the apple and bites into it, taking out a huge chunk. He chews it for a while before swallowing the piece, then stands there for a moment. “Needs sugar.” A moment later, Billy is engulfed in a bright purple light. He rises into the air as his eyes start to glow bright purple, before landing back on the ground, a far more Hulked up version of himself. In fact, the jacket can barely contain his muscles, and it begins to rip at the sleeves. Billy’s also foaming at the mouth & grinning madly.
“BILLY…HORNY!!!” He says sounding more like the Hulk.
“Yes! It worked!” Nergal says. “My research is a success. The Golden Apple of Discord is a powerful aphrodisiac if it’s eaten. Now I can go out and cause panic & horror, just like my Dad use to do.” He turns to Billy with a sadistic grin. “Dear Cousin, I bet you wanna do something more than just hang up Halloween decorations, don’t you?”
“BILLY…FUCK!!!” He replies.
“Of course you do. Come Cousin, lets create some horror in this dim town and do our own ‘Trick-or-Treating’.”
A Few Hours Later…
At Endsville High School, Ms. Butterbean stands in front of her chalkboard erasing the curriculum she just wrote on there earlier. It’s the end of the school day, and she’s planning on closing up and heading home quick to avoid the annoying Trick-or-Treaters. As she places the Eraser down, a loud clutter is heard in the classroom. She turns her head and sees nothing but empty seats, no one in the room. She then hears the door to her classroom slam shut. Immediately she turns her head towards the door and sees Nergal Jr. standing there, arms behind his back.
“Nergal? What are you doing here?” She asks. “You graduated two years ago.”
“Just came back to visit my favorite teacher, Ms. Butterbean.” He says with a smirk. “Say, do you remember when you encouraged Sperg to give me an atomic wedgie at the Senior Prom?”
“Uh, just a little tomfoolery among children, Nergal.” She says nervously.
“Well, I didn’t get the chance to thank you for that, Ms. Butterbean.” At that moment, the classroom door is kicked down. Billy takes a step into the room and stares at Ms. Butterbean. He licks his lips and grins fiendishly at her, as she slowly starts to back away from him. “You remember my Cousin Billy, don’t you?” Nergal says. “Well, he’s here to help say thank you.”
Billy leaps at Ms. Butterbean and slams her hard into the chalkboard, pinning her there against it. He rips away at her skirt, revealing a white thong that she’s wearing underneath, before tossing her face down onto her desk. Giggling insanely, Billy pulls down his pants and approaches Ms. Butterbean, as she begins to panic. “Billy, wait, you don’t want to do this.” She pleads with him. “If this is about those consecutive F’s I gave you that broke the Guinness Book of World Records, I can have that stricken from your record.”
“He’s not gonna listen to you, Ms. Butterbean.” Nergal says. “Besides, there’s only one ‘F’ he’s interested in now.”
“BILLY…FUCK!!!” He rips off her thong and tosses it aside, then thrusts into her with his might. For a moment, her eyes go blank as she feels Billy’s manhood penetrate her love walls. She’s never had anyone Billy’s size inside her before, and now Billy is triple his normal size. She feels as if she’s being ripped apart, and cries out for help.
“OH, GOD!!! SOMEONE PLEASE HE—!” Nergal inserts one of his tentacles into her mouth, shutting her up. Billy begins to pound her pussy like a Prize Fighter hitting the Heavy Bag. The desk scraps against the floor with each thrust he makes. Ms. Butterbean tries to crawl away, but Nergal uses his other tentacles to tie her down to the desk.
“Wow, you know you’re not so bad with your mouth, Ms. Butterbean.” Nergal says, feeling her tongue flail around wildly on his tentacle. Surprisingly, more tentacles pop out from behind Nergal and rip the rest of her clothes off. Billy is drill her pussy from behind like a jackhammer. This goes on for several minutes, until muffled screams can be heard from her mouth.
“Ms. Butterbean, you look like you have something to say.” Nergal takes his tentacle out of her mouth and lets her speak.
“OH, GOD! I’M CUMMING!!!” Her entire body begins to convulse & shake, as she hits her climax hard. Nergal has a pleased grin on his face as he puts up his hand.
“Billy, stop!” He says. Billy stops his motion and pulls out of her, as she lies limp on her desk. “I think her ass deserves some special attention, Billy. Don’t you?” They’re about to go for another round when a gasp is heard from outside. Nergal quickly turns to the door and sees Mindy standing there in shock. She runs off down the hall as Nergal just grins evilly. “Billy, have fun with Ms. Butterbean. I have some business to take care off.”
Mindy dashes through the halls as fast as she can, trying to escape. She turns the corner and hides against the wall, as she tries to catch her breath. She covers her mouth, trying to be completely silent so that they won’t know where she’s hiding. But it’s of no use. A tentacle comes from around the corner and wraps around her neck tightly. Four more follow it and wrap around her body. They then pull her back around the corner and lift her up, to an awaiting Nergal. “And just what are you doing back at school, Mindy?” Nergal asks.
“Not that it’s any of your business, Loser, but I was checking to see if my Cheerleading records have been broken.” She says. “And I saw what you & Billy did with Ms. Butterbean. Billy is supposed to be for Mandy & me only! And I’ll be telling her about this!”
“Something tells me you’ll be too busy to do that.” He replies. Before she can question why, Nergal flings her through a nearby door into the Janitor’s Closet. She hits the floor hard, and tries to pick herself up. But Nergal has other plans for her, and uses his 4 tentacles to bind her wrists & ankles. He then slams her face first against the wall, before using the 5th tentacle to rip off her skirt, exposing her Fluffy Cat panties. He proceeds to pull them up, turning them into a thong and exposing her ass cheeks. “You know, you’ve been a bad girl all these years. And I think you deserve a spanking.”
WHAP!!! Nergal’s tentacle smacks against her ass, causing her to yelp in pain. It leaves a red mark across her cheeks. “Dammit, you better let me go you loser.” She warns him.
“Ooh, you just said a bad word. That’s worth another one.” WHAP!!! Another red mark is left across Mindy’s ass again. Her eyes begin to well up with tears as she struggles to break free.
“When I get loose from here,” she says, “you will be dead meat! I’M GONNA…”
“You’re gonna take some more punishment.” Nergal counters. “And you’re gonna like it.”
WHAP!!! He uses his tentacles to smack her ass, over & over. The sound begins to fill the room, as does her screams of pain. Soon, Nergal starts to notice that Mindy’s becoming wet from this abuse. Dripping wet. He hovers closer to her and whispers in her ear. “You like this, don’t you? You like getting spanked.” He says.
“N-No, I don’t.” She replies. WHAP!!! Another tentacle strike against her now cherry red ass makes her tell the truth. “Y-Y-YES!!! Yes, I loved getting spanked!”
“That’s a good girl.” He says. “I think it’s time for you to get your reward.” Using his tentacles, he lifts her up into the air until she’s held right in front of him. He takes his fifth tentacle and rubs it against her wet love lips, making her even more aroused than she was. As she grins over the sensation of feeling something so big rub against her, Nergal develops and evil grin yet again. And in the blink of an eye, he lunges the tentacle deep inside of Mindy.
“AAAAAAAAAAAAGGGHHHHHHHHHHH!!!!!!!!!!”
There’s a look of horror on her face as she feels the tentacle thrusting in & out of her. She begins to gasp & moan uncontrollably, feeling as if she’s being torn in two. The tentacle reaches deep inside of her, pumping her pussy nonstop. Soon, she stops fighting back altogether, and starts begging for more. “Oh…OH YEAH!! PUT IT ON ME BIG DADDY!!!” She screams.
Nergal becomes lost in his power, as he summons two more tentacles to join in on the fun. One of them joins the one penetrating her pussy, as the other slowly pushes itself into her ass. The tentacles now begin to feed back their sensation to Nergal Jr., who’s enjoying every moment. “Oh, you’re so tight, Mindy.” He says. “Much tighter than the blowup dolls I use to practice on.”
Mindy is now drooling uncontrollably, as her tongue hangs out of her mouth. She’s breathing heavily and barely hanging on as she feels herself approaching her limit fast. “OH GOOD GOD, I’M GONNA CUM!!!” Her body begins to tremble and shake as she hits her orgasm hard. But Nergal doesn’t stop. He continues to fuck her with his tentacles, not caring that she’s already had her climax. “No…I…I…AAAGGHHH!!!!” She has another orgasm, and Nergal keeps going. Now Mindy is feeling her heartbeat accelerate, and she can barely breathe. She looks down at Nergal and pleads with him to stop. “Nergal…you…gotta stop.” She begs. “If I…cum again…I’ll die!”
“Hmmm, interesting.” He says. “Let’s test that theory.” And with that, he sends out a mental signal telling his tentacles to speed up. They now thrust in & out of her at tremendous speed. Mindy becomes overwhelmed with pleasure, as he eyes roll into the back of her head. Her breaths become shorter, and shorter, until they no longer come out of her. She trembles and shakes one more time, before her body falls limp. Nergal sees this and commands his tentacles to stop. They all return behind him as Mindy falls lifelessly to the floor. There’s a frozen look of horror mixed with orgasmic pleasure on her face. He walks over and picks up her arm, checking her wrist for a pulse. There is none. He then leans in close and puts his head to her chest, trying to listen for a heartbeat. There is none. He slowly stands up and looks down at her.
“Wow, I guess she really did die.” He says. “Co-o-o-l.” Nergal turns towards the door, only to see Billy standing there with a satisfied grin. “So, did you have fun with Ms. Butterbean, Cousin?” Nergal asks.
“BILLY BROKE TEACHER’S HIP!!!” He says, before giggling like a madman.
“Excellent.” Nergal says. “Come Cousin, there’s far more to be done tonight.”
Back at Grim’s House…
Grim walks out of the Living Room, feeling vitally informed after watching an episode of ‘The View’. “Boy, that Barbara Walters can be such a firecracker sometimes.” He says, before noticing the Apple of Discord floating in front of him, with a big bite mark taken out of it. “Uh, Honey? Is it possible for someone to take a bite out of the Apple of Discord?” He asks.
“Why yes, bony cakes.” Eris answers, walking into the room. “But it’s an extremely powerful aphrodisiac. And if it ever happens, it could…oh.” She notices the floating apple there, and stands silent along with Grim. At least until she notices the Halloween decorations haven’t been put up. “Say, where’s your friend Billy?”
Grim immediately feels a cold shiver down his spine, and puts 2 & 2 together. “I knew it. Of all the days he would have to cause trouble, it would have to be THIS day!”
“You mean…”
“Yes. Billy must’ve taken a bite out of that apple, and now must be running amuck through the whole town.” Grim says. “And I’ll bet that little stinker Nergal Jr. is behind this. We’ve got to stop them.”
He turns to Eris, expecting her to agree. But all he sees is her chuckling softly. But it begins to grow louder and more maniacal by the moment. “Oh, Grim. You’re so cute when you’re panicking.” She tells him. “Do you remember who I am? I’m the Goddess of Chaos. And with your friend Billy out there, this should make for the most chaotic Halloween ever! In fact, I should get a front row seat for all the madness.”
She laughs maniacally as she disappearing into thin air, leaving only the laughter echoing through the room. Grim looks down and rubs his forehead in frustration. “Oh why did I ever marry that Kook of a woman?” He asks himself. “Oh yeah, the great sex. But I can’t let Billy get away with this. There’s enough death on Halloween without Billy sex killing out there. And if my wife won’t help me, I know someone who will.”
8 Hours Later…
On a jet plane heading towards Endsville, Mandy rests in her sleep. She has her eyes closed, but isn’t asleep. Instead, she’s thinking about the recent battle she just went through. It was brutal & bloody, and only ended when Mandy snapped his neck with her own bear hands. Now, all she wanted to do was get home, get in bed, and go to sleep beside Billy, as he holds her in his arms (although she would never admit that in public, ever). But fate doesn’t seem to have that in mind, as she opens her eyes, and a weird, but familiar feeling travels throughout her whole body, chilling her to the bone.
“I sense horror, death & dread will visit me in the near future.” She says. Just then, a black mushroom cloud appears in front of her. A moment later, Grim walks out and approaches Mandy.
“Mandy, we’ve got a problem with Billy.” He says.
“5 points for me.” She says.
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When Billy Screwed Mandy