Spencer x Derek oneshots- Criminal Minds

Ass man

Ever since the two moved in together, Derek had a habit of walking around the house naked. Spencer didn't mind, in fact he was glad his partner was comfortable enough around him to be that carefree, but it was the result of many unwanted erections.

Spencer knew he had a thing for Derek's ass, he always did. Even before they started dating, Spencer's eyes would unconsciously drift to the tightness of Derek's slacks, seeing the globes of his cheeks outlined by the satin fabric. He always regretted looking when he felt the tightness in his own pants.

When the two finally got together, Spencer was grateful he could look at Derek's ass without having to worry about being horny at work. He knew Derek could feel him watching, and that was the sole reason he started walking around the house naked.

Spencer couldn't help but stare from his spot on the couch as Derek walked through the living room, the globes of his cheeks jiggling with the movement of his legs. He could feel himself getting hard already, but he couldn't bring himself to do anything about it.

Derek turned around and smiled knowingly, leaning against the kitchen counter with his arms crossed over his chest.

"Like what you see, Pretty boy?" He teased, though his cock twitched in interest at the result of his boyfriend eyes and soon enough he was fully hard, his thick cock resting against his stomach.

"Yes" Spencer responded, licking his lips and swallowing thickly as Derek pushed off the counter and started to slowly walk towards him.

He slowly walked towards the couch, his lip pulled between his teeth with a smirk on his face, watching as Spencer's eyes darkened. Reaching the bed, he slowly crawled along the mattress until he was eye level with Spencer's hard cock.

"You want me to suck you off, baby?" Derek smiled mischievously, purposely letting his breath fan along Spencer's length.

Spencer couldn't help the low whine that escaped his lips at the warm brush of air. He wanted to feel Derek's lips around his cock so badly, but the desire for something different was much stronger. He didn't know how to approach the subject though, knowing he was usually the bottom and Derek was usually the top. There was no discussion about it at the start of their relationship, thats just how things worked between them.

"I want you to, so badly, but I want to try something else if you're up for it" Spencer bit his lip nervously, watching as Derek's face morphed into a look of confusion but it was quickly masked with a soft smile.

"Anything baby, you know all you gotta do is ask"

The younger man was relieved at that response, knowing things could have went south quickly. He took a deep breath and forced himself to meet Derek's eyes, giving him a reassuring smile when those eyes held a flicker of concern.

"I want to fuck you" Spencer decided to put it plainly, knowing Derek preferred him to always be upfront and honest.

Derek looked understandably surprised and for a second Spencer thought he had just ruined their entire night, but the older man soon smirked and crawled up the bed so his lips were inches away from Spencer's ear.

"You wanna fuck me?" He asked, his voice husky with lust. "You think you can handle it?"

Spencer couldn't help but frown, knowing he hadn't topped someone in a long time. There was no doubt about it, Derek was a fairly solid man, fucking him was going to be hard.

"We'll see" The younger man smiled mischievously, grabbing his hand and leading him to the bedroom.

He gave his boyfriend a sweet, long kiss as they approached the bed before prompting him to turn on his stomach. Derek looked surprised but he held his guard well, moving to lie on his stomach with his head resting on his folded arms.