~Dipper x Bill AU One-Shots~

Demon Mating InHeatBill x Dipper AU

This one and the next few were requested and don't be afraid to send in request ^w^
Note: they are still in gravity falls it's a similar case like the last one. Most of these one shots will be in the case that bill comes back and makes amends and it's years later and Dipper is already 18 in most of these. Fair warning this one is a smut
ALSO IM SORRY IVE BEEN SO BUZY WITH SCHOOL AND HOME STUFF BUT ILL TRY MY BEST TO GET THESE OUT SOONER AND OMG TOP DIPPER IS MY LIFE

|~Dippers POV~|

Bill and I had been getting something from the kitchen, when he grabbed the counter and his breathing seemed to quicken. "Bill are you alright?" He closed his eyes and his cheeks became flushed. I felt his forehead and pulled my hand away quickly. "You're burning up! C'mon lets go to the room so you can rest and then I'll get you some medicine." As I dragged him up to our room he had opened his eyes again but they seemed...glazed over almost. His panting was still noticeable as well. I sat him on the bed as I got him out of his sweatshirt. As I was about to help him out of his jeans he stopped me and I noticed why. I felt the blush spread across my face immediately. "B-Bill.." His eyes seemed to roll back just as I said his name, which only darkened my blush. "What's going on?"
He seemed to be collecting himself before answering," Demons...we have something called a heat, much like the animals on your planet, except ours happen every 100 years. I guess I lost track of when mine is." He laughed breathlessly. "It last up to two weeks unless we mate before then," his words were starting to sound like moans and he fell back onto the bed, grabbing the sheets like a lifeline," Oh fuck..." He was panting harder now and the bulge in his pants was much more noticeable. "H-How can I help?" It took him a second to calm down but when he did, I just couldn't help but notice how sexy he looked right now...just laid out like that, no shirt, sweating and panting like every touch turns him on. I put a hand on his chest and his panting and moaning started up again. I heard the door shut and lock and knew it was Bill. I felt along his chest, his stomach and up to his shoulders. "D-Dipper you don't have to h-help I d-don't want to force y-you into anything-Oh fuck do it again!" I had just run my hand over his nipple at the end of his statement and his sudden outburst just turned me on even more. I leaned over him and instead of touching it I licked it this time. "Dipper!" His eyes rolled into his head again as his hips bucked upwards. I moved up towards his ear and nibbled on it. "You look so sexy like this, shaking with want, begging for my touch. I wonder how loud I can make you scream?" My hand went to the bulge in his pants and I added pressure as I continued whispering in his ear. "How bad do you need me Bill? How bad do you want me?" He moaned even louder and bucked into my hand. "P-Please dipper, need you, need you so bad!" I moved away to pull my shirt and pants off, only leaving my boxers. I climbed onto bill's lap and leaned over, connecting our lips in a rough, passionate kiss. He tugged on my hair, making me moan. The throbbing between my legs beginning to become unbearable. Right before I pulled away for air I bit his bottom lip and tugged on his golden locks, tearing a loud drawn out moan from him. Knowing I could do this to him, that he's just begging for my touch, heat or no heat, it makes me feel powerful. 'Now I know why the boys at school always bragged about being a total top.' I bucks my hips against his and moaned as he let out a whimper. I leaned over his chest and began trailing my way down to his pant line, leaving as many markings as I could on my way there. By the time I reached his jeans he was pulling on his own hair in frustration. "D-Dipper, please stop teasing me! I can't take it I need you!" I smirked and slowly pulled his pants down. "Then tell me Bill," his pants were off and I was holding down his hips as I hovered over the bulge in his boxers,"what exactly it is you need from me."
He whimpered and shivers ran down my spine at the noise. "Dipper..need you to f-fuck me...need you to fuck me and fill me up inside and pound into me until I can't take anymore." 'God I can't take it anymore that was too hot' I peeled his boxers off and started sucking on his tip. I felt him trying to buck into my mouth but I wouldn't let him. As I pulled away I grabbed the lube I had under my bed and applied some to my fingers. I slowly teased the tip of my finger into his entrance and his reaction nearly had me cumming untouched. He was already fucking himself onto my finger, begging for another, his moans louder than before. I simply couldn't deny him and pushed three of my fingers in at once. "Oh fuck, master!" The name only made me smirk,'Oh I'm so gonna tease him for this later.'
A few minutes of me thrusting my fingers inside of him and the right angle and he was suddenly screaming. "Looks like I found it huh?" I suddenly pull out of him, the whimpers he makes very loud in my ears. "Master...please I need you inside me. I can't wait anymore." I moved back up to his face and slowly pulled him into a kiss. "Beg properly and you'll get what you deserve kitten." He shivered at the name and I began marking his neck while he spoke. "Master, please, I want to feel your huge cock inside of me, filling me up like no one else. I want to feel you cum inside me please, please!" I applied a generous amount of lube to my aching cock and lined up with his entrance. "Only because you asked so nicely kitten." I thrusted my entire length into him and moaned at the feeling. He was so tight around me, squeezing as he adjusted to my size. "M-Move." 'Eager one isn't he?' I began moving in an out of him slowly, trying different angles so I could be sure where his-"Oh fuck right there, do it again! Master please!"-well I guess I found it. I slammed into him, nailing his prostate each time. I watched as he moaned and screamed underneath me, nail scraping down my back and I sucked more marks onto his skin. "Oh fuck bill, love your sweet tight ass squeezing the fuck out of my dick. Don't you love having me inside you kitten? Tell me how much you love it!" I spanked him making sure he answered. "L-Love it s-so ah much! Harder!" I continued pounding into his ass as hard as I could, hearing the bed creak from the force. I could feel the familiar tightening of my stomach muscles. "Fuck I'm getting close kitten!" He nodded in response. "M-Me too!" I suddenly felt him tightening around me more than before, his eyes rolling back into his head as he came all over his chest. "Dipper!" "Oh fuck, Bill!" I couldn't hold back anymore and came inside of him, filling him while I continued pounding him through my orgasm.

After we both came down from our intense orgasms, I laid down next to him and pulled him to my chest, pulling us both under the covers. "How you feeling?" I asked with a huge blush on my face. 'That was so intense I can't believe we just did that.' "Satisfied, embarrassed, tired as fuck and safe, being in your arms right now." He looked up at me and gently kissed me. "Thank you dipper. I love you." I blushed at the sentiment. "I-I love you too bill." We smiled at each other for a second before bill cleaned us up with a snap of his fingers and we settled down for bed.

Okay I didn't expect it to end up so kinky I swear and I'm so sorry this took so long to get out, I've had so much going on lately. I'm gonna work on the other request that I had gotten and get it out soon I promise. Also if anyone wants to also see a second part for any of these one-shots I'm glad to write a second part. I also do fluff this isn't just smut so request whatever you like :)