This is a one-shot prequel to A Betrayed Devil. Since it's very unlikely that i'll do a Damian x Grayfia lemon in A Betrayed Devil, not even in a flashback if I do a flashback though i doubt I'll do that as well. So, I figured I'd create a one-shot that shows the last time Damian and Grayfia had sex... before he'd find her in bed with Sirzechs.

Disclaimer: I do not own High School DxD. I only own the OC Damian Mammon-Lucifer.

Grayfia Lucifuge let out a content sigh as she sank her naked body down into the warm bath she had prepared for her. She laid there for a few minutes, the water right up to her rbeasts which were hidden by the bubbles in the bubble-soaked bathtub. Slowly, she began to clean her body, starting with her arms and then worked on her legs before focusing on her breasts which incited gentle moans from her as he wet hands brushed over her nipples. It was starting to turn her on

She looked up at the sound of the bathroom door opening and smiled when she saw her lover, Damian Mammon-Lucifer, the grandson of Lucifer himself, standing there. Judging by the surprised look on his face, he hadn't been expecting to find her in the midst of a bath. She won't lie, she had left the door unlocked purposefully.

"Well?" Grayfia raised a brow at him. "Are you going to stand there or are you going to join me?"

She lifted a leg and draped it over the side of the tub, running her hand along it while staring at Damian with a lustful expression, especially when she saw the tent pitching in his pants. She smiled at the look of love and lust in his eyes, but her smile waned when she felt a pant of guilt in her heart.

How could she smile at him so lovingly when she's been sleeping with his best friend for the past few months?

Damian chuckled and began stripping, drawing Grayfia's gaze back to him and she put away her dark thoughts of her betrayal to their relationship in order to focus on him. She licked her lips as more of his body was exposed to her eyes until finally he stood before her, naked as she was.

Grabbing him, she pulled him into the bath which made the two of them laugh as the water went splashing onto the bathroom floor.

A few minutes later, Grayfia fell back onto the bed in their bedroom, Damian leaning down to kiss her softly which made her hum in pleasure as she kissed him right back with all the love she could muster, her tongue prodding at his lips and he granted her entrance while his own tongue met her own in a battle for dominance. His hands roamed up and down her body, groping her legs, her thighs, then snaked round to cup her ass cheeks which he squeezed, granting a muffled moan from the silver-haired woman.

However, she rolled them over and smirked down at her lover before kissing his lips, then started to descend down his body, trailing kisses along the way. Damian just watched her, shivering a little at the look in her eyes as she kept them locked with his own. She never broke contact, even as she came to his cock and gave the tip a little kiss. She trailed down a little further until her breasts were pressing against the hard appendage, making Damian realize what she was going to do.

Grayfia threw him a wink before she engulfed his cock in between her soft tits. She started moving and thrusting her whole body forward and up to stimulate both the movement of his cock in her breasts and give him the show of her sexy body. Damian struggled to find his voice as his head leaned back and he lost his concentration from the sensation of her revolutionary titfuck.

Grayfia saw that her boobjob was working spectacularly and smiled at her accomplishment. She slowly unwrapped her hands from around his waist and pressed them against her breasts as she felt her hands sink into her chest. She started rubbing her breasts up and down as she stimulated Damian's cock and felt each twitch and jolt pass through it against her chest.

The Devil on the receiving end of the heavenly titfuck felt like his mind was slipping. Like always when he had sex with Grayfia, his mind would blank in euphoria. It felt like his whole body was getting a massage that reached every perfect point of ecstasy.

It wasn't long before he felt a familiar pressure building and gripped the bed sheets. "Grayfia... I'm gonna cum!"

Suddenly, the wonderful sensation started to subside and the cum churning in his cock settled. Damian tried to fight the painful feeling of having his release postponed as he looked down to see Grayfia giving him a smirk. "Not just yet, my love~" She purred, giggling at the agitated glare in his eyes for being denied his release.

"You fucking tease." Damian growled with both irritation but amusement and fondness. He was more irritated at not cumming than he was at her, this wasn't the first time she's pulled this stunt.

Grayfia threw him another wink then suddenly started to jerk her breasts side to side and caused Damian to yell as he felt his cock stir and nearly burst from her movements. "Come on, Damian. Let's see how long you can hold out for."

She leaned down and took the top of Damian's cock in her mouth without hesitation, causing him to nearly cum again but just barely hold himself in.

The next thirty minutes were some of the longest in Damian's life. Grayfia's amazing titfuck continued to send pleasure through his body as it was only enhanced by the sensation of Grayfia sucking and rolling her tongue over his tip. Sometimes she pulled her mouth off and ran her tongue back and forth over his head before popping back down and sucking on his dick so hard that he was worried she would knock his balls off in the process. And his concentration was continuously struck as she made erotic sucking noises and moans like something out of a porno.

After an hour of suffering, Grayfia removed her mouth which was now coated in her saliva. "Come on, Damian!" She encouraged, speeding up the movements of her tits as they practically suffocated his cock. "Cum! Cum all over my fucking tits!"

"AHHHHHHHHHHHHHH!"

On cue, Damian released the load he had been holding in for so long from between Grayfia's breasts. The silver-haired woman was waiting, her mouth open to take some into her mouth while the rest spilled onto her breasts.

After a few moments, Damian finished releasing one of the biggest loads of his life and exhaled deeply. Grayfia sat there on her knees as she felt his hot cum cover her face and the top of her breasts. She started licking up the amount that had seeped into her hands before running a finger over the ejaculate that covered her face and breasts. She swallowed the last of it before gulping it down and catching her breath.

"Amazing as always." Grayfia smiled up at him before she got to her feet, then slowly crawled onto the bed like a cat on the prowl. She turned around so her ass would be facing him, bending forward until her front was laying on the bed, her ass sticking in the air. She reached back and caressed her well-toned ass cheeks.

"Come on, Damian~" She purred. "Fuck me so hard."

Damian didn't wait for another second as he came up behind her and grabbed a handful of her ass. He lined his cock up with her cunt and slammed into her as she threw her head back and moaned, "Ahhhhhhhhh~!"

Damian took a deep breath and tried to control himself as he felt his dick slide into Grayfia's pussy. It was like a warm, velvety glove that convulsed and squeezed around him. He wrapped his arms around her chest, just underneath her large breasts as he felt their substantial weight rest on them. He took a moment to catch his breath before he began thrusting.

"AHHH! AH! AH! AH! AH!" Grayfia screamed out in pleasure as Damian didn't take any time to start slow as he started pounding into the beautiful woman as fast and hard as he could. Grayfia gasped and moaned in pleasure as her whole body was rocked and jerked forward with the impressive force of his movement. Grayfia could feel her bare breasts and nipples rubbing against the bed sheets and covers as Damian reached his peak lunge and could almost hit her cervix. Grayfia lost her breath and panted out, "Y-You're so forceful, Damian. Oh, I love it!"

Damian chuckled, then pulled her up so her back was pressed against his chest. He hooked a hand under Grayfia's knee and lifted it for better leverage, gaining more penetration and depth with his thrusts. He could hear the sounds of Grayfia's juices making a splash with every thrust he made as liquid coated his crotch. He rested his chin on her shoulder, briefly giving it some kisses and licks before grunting softly in her ear.

"A-AH! I-It's great, Damian! It feels so good! M-My cunt! Pound into my cunt! Fuck me so hard I'll be unable to walk in the morning! MMMM!" Damian gently pulled on Grayfia's chin and they locked lips while he kept pounding her from behind. His hips and balls slammed into her buttocks and made the beautiful flesh jiggle with each move. His ramrod cock slammed and pulled from her tight, quivering pussy as the two lovers persisted through the heat and exhaustion. Grayfia's moans of pleasure and Damian's groans fill the bedroom.

Damian tightened his grip on the knee and leg in his hand as he lifted Grayfia's leg and rested it over his shoulder. He showed off the maid's amazing flexibility, feeling her lean and tender limb squeeze and flex along his chest. He got even better access to her wet quim as his hips started speeding up and slamming into his silver-haired lover with even more ferocity. His eyes dipped down to Grayfia's enormous chest bouncing and jiggling with each extra pound sending a reverberation through her body.

Grayfia opened one eye, seeing the concentration on Damian's face as he focused on her bouncing breasts. She closed her eyes again and just enjoyed the immense pleasure of being fucked by her lover who sent euphoric shocks through her entire body every few seconds.

It made her forget about what she had done.

The two had continued this for over twenty minutes, both staving off their orgasms with immense sexual stamina and lingering thoughts. They were soon off the bed and pressed against the wall. Grayfia kept her hands on the wall as she turned her body to face Damian, causing him to stop his efforts as his lover faced him. She gave him a lusty smile, grabbing both his hands and placing them along her juicy thighs before leading them down. Damian instinctively grabbed her underneath her knees and lifted her legs off the ground, leaving Grayfia hanging in the air with her only support being her back against the wall, his grip under her knees, and the solid member throbbing in her pussy.

She leaned forward and wrapped her arms around Damian's neck, squishing her chest against chest. She gently stroked the back of his head, Damian quickly going back to thrusting inside her as Grayfia said quietly in his ear, "Fuck me like crazy, Damian. Pound my pussy with your huge cock until you cum. Fill me to the brim with your seed. Until it starts dripping out from how hard and raw you fucked me. Make it so that I will never forget your touch. The feeling of you sliding in and out of my cunt should be the only thing I desire every day and night. The feeling of my breasts bouncing with each hit. The feeling of you slapping against my ass. The sensation of you poking and pounding in my cervix. I want to feel you fill me up."

Damian was grunting and groaning as he thrust into her, now starting to jackhammer her as quickly as he could as he felt a struggling, "G-Grayfia, I'm gonna-"

"Do it inside me." She held his face with both hands and looked into his eyes deeply, "I want to feel you inside me, Damian. Do it. Cum in my - Ahhhhhhhhhh~!" She let out a breathy moan as she felt him finish inside her, his member twitching before shooting out a flood of white liquid as deeply in her as he could. He had lost his voice in a mighty roar as the hold on her legs shook and her own feet curled and trembled.

Damian's legs gave out from the effort of emptying inside her. He dropped to his knees as his heavy panting mixed with Grayfia's, her head leaned back in pleasure with her chest heaving. The silver-haired woman trembled and stilled, feeling his semen drip out from where he was still connected to her and pooled onto the ground beneath them.

Grayfia lifted her head, her eyes hazy and her cheeks flushed before she pushed forward and forced Damian on his back with a yelp of surprise. With him on his back, Damian looked up in surprise as Grayfia lay on his chest, her breasts pillowing underneath her as her face softened. She leaned forward, capturing his lips in a deep, passionate kiss before she pulled back.

"I love you." Damian whispered before Grayfia could say anything.

She smiled at him, while on the inside was holding back the urge to cry at hearing the love, the fondness, admiration, in his tone. He truly loved her, she did not doubt that, never for a moment... but she couldn't say that it was the same on her end. By the fires of Hell, it tore her up that she had been unfaithful to him, that she had fallen in love with another man and continued to string Damian along.

She couldn't go on like this. It wasn't fair to her or Damian.

She simply smiled back and kissed him, moving so that she could engulf his cock in her pussy again to begin riding him, to make her forget about the betrayal she had done.

Sadly, it would be a week later when Damian found out about Sirzechs and Grayfia, and all hell broke loose...

And that's it for this. I doubt it was that good but... still, hope you enjoyed it.