A/N: If you haven't read parts 1 & 2 of the "Because We're Family" series, please do. It's only going to get more complicated from here on out. This work cannot be properly understood as a stand-alone. Part 1 is called "Dream When It's Not Safe To Feel" & part 2 is "Good Things Do Happen".

Warning: Explicit Content. Dean and Cas get into an intense argument. If screwed-up thoughts on sex bother you, know said thoughts will be present from here on out. Thank you for reading. 3

Charlie took to new friendships like a duck to water. Once Kevin recovered from his brief crush on her, they grew close quickly. All their talk of nerdy things NOT supernaturally related made him feel at ease, like a normal person again. Charlie and Cas also became fast friends. He taught her correct Elizabethan English to enhance her role-playing skills, and she convinced him to watch all of the "cult classics" Dean was always referencing. One night they were curled up on the couch, watching "The Empire Strikes Back" while Cas braided her hair. She reached back, feeling the plait. "How did you get so good at that? Does Sam let you braid his hair?"

"I'm learning my human self is quite dexterous," he responded, failing to answer the second question.

She giggled and took a sip of tea. "Bet Dean appreciates that," she said under her breath.

"He does, actually," he replied, and her fit of giggles renewed.

Later that night, Cas and Dean lay in bed stroking each other. "D'you wanna-" Dean began, but was cut off with a gentle bite to his neck. His breath hitched and he rolled onto Cas, pinning him to the bed with his weight. His hands wrapped around Cas' wrists, holding them above his head as he kissed along his jaw-line. Cas' cock twitched when Dean leaned forward, putting weight onto his pinned wrists.

"More," Cas begged, canting his hips up. Dean reached off to the side, into the nightstand drawer.

Cas spread his legs, bending his knees to cage Dean in. Dean leaned back, one of his hands slick. He pressed a finger against Cas' hole, and it sunk in without resistance. Dean pressed another finger in, drawing a grunt from Cas. "You want it so bad, don't you?" he teased, slowly moving the digits around.

"Please," Cas entreated, clenching when Dean brushed his prostate. Dean continued to stretch him out, kissing his nipples.

"Just let me open you up," Dean murmured against his skin, licking at the little droplets of sweat on his neck. "Don't wanna hurt you…"

Cas bucked up against his hand, groaning. "I… don't care," he panted, moaning when Dean started stroking, "Hurt me."

Dean's hand slowed, and he reached forward, grabbing something from the drawer. He stopped moving his fingers inside of Cas. "What did you say?"

Cas pushed down against Dean's hand, trying to get Dean to brush against it again. "I said I don't care if you hurt me. Hurt me, make me bleed – just fuck me."

Dean pulled his fingers from Cas' hole, who gave a whine of protest. As Cas shifted up onto his elbows to watch Dean, he saw the man cleaning his hands with a wipe from the drawer. Cas looked around the bed, but the lube and condoms were nowhere to be seen.

Dean tossed the wipe into the trashcan on the side of the bed, and said finally, "That's it."

"What's it?" Cas asked, even more confused when Dean shifted from his position near Cas to sit on the edge of the bed. He took a deep breath, and picked his underwear up from the floor, before stepping into them.

He stood up, and turned to look at Cas. "I don't know what's gotten into you, but I am not going to be part of it." His eyebrows were knit in worry, but his tone was firm.

As he began to walk towards the door, Cas asked, "Where are you going?"

Dean sighed, and looked over his shoulder at Cas, his hand on the doorknob. "I'm going to go take a cold shower. I think you should sleep in your own room tonight."

"We were in the middle of something, Dean," Cas pointed out, incredulous.

"Yeah, we were. But if you need it that bad, there are toys under the bed." With that, he opened the door and left. Cas stared at the door for a long time in shock.

What just happened?

When he finally tore his eyes away from the closed door, he looked down at himself, suddenly annoyed. He was still rock-hard and he could feel his ass stretched out, slick and waiting. Couldn't Dean have fucked him and yelled at him later? He sighed in frustration and pawed around the bed until he found his boxer shorts. He pulled them up and shifted to the side of the bed, sitting up. He slowly stood up, seeming to make a decision. He cursed in Enochian and rummaged through the box under the bed. He selected a small toy, just big enough to press against his prostate, and took the lube from the drawer. He made his way quickly back to his own room.

Fine, he thought. He didn't need Dean. He could do this himself.

When Dean got out of the shower, he brushed his teeth quickly, and then headed back towards his room. He had a whole conversation planned out in his head in case Cas hadn't left, but thankfully, he had. He was tired and frustrated tonight – they could have that conversation tomorrow. As Dean settled into bed, he suddenly heard sounds coming from next door. He pulled out his iPod, intent on ignoring them when he heard a harsh moan.

Fuck.

Dean set his alarm clock, and was about to turn on his iPod when he heard a brisk slap break the air.

Jesus Christ. Cas was spanking himself.

He felt himself getting hard again, and he cursed, realizing his iPod was dead.

He could ignore it. Just turn his back to their shared wall and go. To. Sleep. He could do this.

A needy groan reached his ears. Dammit, this was his fault. He'd never taught Cas to be quiet. He reached down to grasp his erection, and cursed himself internally.

This was wrong. He shouldn't be doing this. He should be leaving his room until Cas was spent and asleep. But he couldn't make himself move from the bed. He settled into a rhythm, pulling on himself quickly. He was mad at Cas, but Dean still wanted to cum with him. As he stroked himself, he bit back moans. He wasn't going to give the fucker the satisfaction of knowing he'd gotten to him. He had a point to make to his boyfriend, and he couldn't do it if he knew Dean had been hardwired to respond to Cas' body.

He groaned into the pillow as Cas moaned again, the shuddering moan he always gave right before he tipped over the edge. Dean listened with bated breath, his hand slowing so he didn't go over first. Cas groaned, and moaned "De-" before he seemed to remember himself. He moaned roughly, no words this time, just the frantic sounds of his orgasm pulling him under.

That was enough: biting back a moan, Dean pulsed in his hand, his legs shaking from the force of it. His breath finally evened out, and he reached over the side of the bed to find something to clean himself with. But as his hand reached down, he felt the corner of the shoebox where they kept their toys sticking out. The mess temporarily forgotten, Dean's hand closed around it and he brought it up to the bed. He took the lid off and peered inside. Cas had taken the small blue one, the toy the two had started off with after they'd started having sex. It was a curved silicone toy with a flared base. The thought of Cas shoving that thing inside of him was enough to make his cock ache, and he felt a small whine of frustration catch in his throat. He put the box back and grabbed a pair of boxers to clean up. Dean turned his light off and settled in against the pillow.