Warning: Smut... How Bad... Idk... Just A Lot Of It... Enjoy?
_______________________________________"Okay, Al." (Y/N) took a deep breath before making her final decision. "We can..." A throat clear. "... Mate." No more words were said as Alastor's sharp tongue ran up her neck and jaw line, making her whimper under him. He loved it. He should be digusted, but he was enjoying it too much.
"My dear..." Alastor smirked and nibbled at her neck. "... I promise you that you will not regret this." The Radio Demon bit down slightly, blowing falling from her neck and Alastor licking it all clean, knowing it will be marked up sooner or later. All the proof that she belongs to him and only him. "Undress, my love."
"Uh- You too?"
"With pleasure." As they both slowly undressed, they finally saw parts willingly that they never seen before. She was shocked after having a better look at his body - even though she saw him naked before due to his wound, she never fully examined his body. He had fur, but his body was full of scars from when he was alive and dead. Poor guy. His small tail was wagging happily and his cock stood up - rock hard. (Y/N)'s body had fur as well. It was thicker than Alastor's, but not too much. She had small-ish breasts and her longer tail was hiding her lower regions. Alastor licked his lips hungrily and leaned down on top of her. "You should see yourself right now, dear. You're the most beautiful thing these eyes ever layed upon of." Blushes covered her face before looking away nervously. "Look at me."
"Alastor, this is very embarressing." (Y/N) whined and looked at him shyly. "When you're out off your rut, you'll probably be disgusted and leave me."
"Why would I do that?" Alastor seemed to calm down slightly and leaned down to her and kissed her lips gently. "You are the most beautiful person I have ever layed eyes on. You supported me, comforted me in the most difficult times. I have never been more sure about it, dear. There is one thing though about being in a rut..." He stopped and looked away, ears falling back as (Y/N) examined all his body noticed. He knots when mating inside of a rut. Her mouth opened and gulped at the fact they would be stuck together for a while. "I'm sorry if this is... Unnatural."
"No, no! It's fine, Al." The Hybrid stroked his cheek and kissed his lips gently to return the favour. "Thank you for saying that. I'm glad you won't leave me."
"Thank you, dear. I cannot garuntee that I will be gentle with you, but I'll try and make this as nice as possible for both of us." Alastor used his hands and motioned her to go onto her front, so she went on her hands and knees. "Look at this beautiful tail." The male grabbed it gently and his hand hidden in the thick, fluffy fur. "So beautiful." He kissed it and she shivered and looked over her shoulder, a red blush covering her whole face. "You ready, my love?"
"Y-Yes..." (Y/N) nodded as Alastor moved back slightly and started to lick her lower back and trailed down to her enterance, making sure it wasn't dry, but he didn't even need to prep as she has prepped herself.
"Look at you... All ready for the mighty Radio Demon."
"Only for you, Radio Demon." (Y/N) smirked which sent bolts up his back and he mounted her, getting on his knees, grabbing her hips and lined himself up. "I'm ready when you are, Al." That was all the permission he needed before gently pushing himself inside which was considerbly easy.
"Soo tight..." The snarl was visible on his heated face and he leaned down, now resting his front against her back while both arms are wrapped around her waist, clinging and almost begging for her not to move away. "Soo warm..." He then licked her neck as he was slightly taller and bitten down on the back of her neck, while starting to thrust slowly. The urges were going through the roof.
"Alastor-!" (Y/N) moaned loudly, claws digging into the sheets. "Fuck-! Aah!" It didn't hurt much, but slightly. It felt good mostly. "You can go faster..."
Not another word before he was panting heavily and going faster and rougher, his knot hitting around her enterance. He grip got tighter on her neck, as blood started to run into his mouth, and blood started to drip down her waist, dripping onto the bed sheets. This did hurt, but the pleasure was killing the pain.
"I never knew-" Alastor moaned, begging to let that smile drop because it was becoming too painful to hold, but the green threads were now showing and glowing. "-This would be soo good."
"I know-" (Y/N) moaned and panted, gripping onto the sheets even tighter. "You feel good too! Just- please! Don't stop!"
"Not planning on it, dear." After some more thrusts, things started to become fast and sloppy. "I... I'm getting close, dear."
"Don't stop, Al. Do as you crave. Show me how much I mean to you."
"Oh, I will." He smirked and his antlers grew before forcing her to lie on her stomach and his own body weight held her down, even though he was very skinny. His thrusts became very rough and it didn't take long before his knot slipped in and they both gasped and froze in place. Alastor soon released his seed and panted heavily, going limp on top of her and smiled at her and they shared a kiss. "You did... Very well my love."
"You too, dear." (Y/N) panted and nuzzled her face against him and he did it back, giving a real smile.
"We... We might be stuck like this for a while..." Alastor's pants got slightly slower and tried to pull out, but he couldn't. They were definately stuck for a bit. "I'm not usually like this."
"Only in rut?"
"Yes."
"That felt amazing, Al." (Y/N) kissed his cheek gently and his smile made her smile and they shared a kiss, both catching their breath fron recent events.
---
"Uhm... Don't go near Alastor and (Y/N)'s room for a while." Lucifer walked into the large part of the ship as everyone looked at him questionably. "They have..." He cleared his throat. "... Tied the knot."
"About time." Husk smirked and relaxed on the couch.
"Ey, the big guy finally got it going." Angel chuckled, being dirty as well as Charlie and Vaggie didn't say anything, but knew what Lucifer meant.
"Wait, why is it important that they fucked?" Cherri asked.
"Freaky face hates intimate actions and hates being touched." Angel explained. "... Since he was in a rut, him and (Y/N) finally had sex! Took him long enough to do it to be honest."
"Wow..." Cherri chuckled. "... Being in Hell for soo long and both only now had sex? Cool."
---
"I'm getting sleepy." The hybrid yawned tiredly and Alastor managed to pull out now and clicked his fingers, cleaning bed up before they both curled up in the bed, duvet covering them up to their chest areas. "Thank you..."
"Sleep, my dear. You deserved it. Did soo well for the Radio Demon."
"You did well as well, love."
It didn't take them long before they both fell asleep in each other's arms.

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Hazbin Hotel: Alastor X Reader - A Perfect Life In Hell
FanfictionIt was 1907 in Alastor's human life and things weren't great for him. Kids didn't like him because of the way he is. His Father hated him for being different, but his mother had always tried her best to make her boy happy, but deep down, she knew it...