Cas and Dean stared at the girl in shock.

"Stop staring at me!" She said with her high pitched voice. "And someone get me some clothes!" The girl tightened the blanket around her body.

Dean looked at Cas. "Can you go, um, get her some clothes, please?"

Cas nodded and in an instant, he was gone.

Dean looked back at the girl. "So, uh... What happened, Sam?"

Sam threw up his... her arms, but quickly put them back down when the blanket started to fall. "I don't fucking know, Dean! I just woke up like this!"

"I'll go see if I can find out what's going on..."

"Please do!"

Dean walked out the room just as Cas appeared back in the room.

"Um, here you go, Sam..."

Sam stood up and shuffled over to Cas. He took the clothes from him. "Close the door, please."

Cas nodded and went over to the door. He walked out and was about to close the door, but Sam stopped him.

"Where are you goin, Cas?"

"I was going to give you privacy..."

"Dude, stay in here with me... Please."

Cas was about to speak, but saw the puppy dog eyes. He nodded and walked back in, closing the door behind him.

Sam went over to his full length mirror and dropped the blanket, causing Cas to blush and turn away.

Yes, Sam was Cas' boyfriend, but as far as he was concerned, this wasn't Sam.

Cas was pulled from his thoughts when Sam started talking.

"I never realized women were so soft..."

Cas turned his attention to Sam and saw her rubbing her cheeks.

Then her hands trailed down his body and to her sides, still rubbing.

Cas looked away again, his blush growing darker. He placed his hands on his lap, trying to conceal the growing bulge in his pants.

"Cas, feel!" A still naked Sam bounded over to Cas and grabbed one of his hands. She placed Cas' hand on her stomach. "Isn't it soft?"

Gulping a bit, Cas nodded. "Y-Yes, Sam it is very soft.."

Sam tilted her head and narrowed her eyes at Cas. "What's wrong?"

"Nothing..."

"Cas, don't lie."

"Nothing's wrong, Sa-"

He was cut off by Sam suddenly grabbing his other hand and lifting it.

Sam giggled when she saw the bulge in Cas' pants. "I made ya excited Cassie?"

Cas didn't say anything back. His face was beet red and he refused to look at Sam.

Sam giggled again and let go of Cas' hands. She suddenly started to straddle him, causing him to let out a small gasp.

"Cassie, you can look at me. It's still me. Just a girl version. My body is still yours."

Cas turned his head to Sam, the blush still evident on his cheeks. He wanted to say something, but couldn't think of what to say. Sam was putting pressure on his cock and he was flabbergasted.

Sam gently cupped Cas' cheeks in her hands, then connected their lips. She closed her eyes and pulled him closer, deepening the kiss. Cas kissed back and their lips moved in perfect sync.

Breaking the kiss, Sam pulled away and lifted Cas' shirt over his head.

"Sam, are you sure you want-"

"Yes. Hell yes."

Cas nodded and stood up, holding Sam tightly. He turned around and laid her on the bed, then climbed on top of her. He started kissing down her neck and then chest.

Sam let out a small moan when she felt Cas start to suck her nipple. "Oh, Cas... fuck..."

Cas released her nipple and started kissing her neck. "Tell me what you want, Sammy."

"Fuck me. Please."

"As you wish..."

Cas unzipped his pants and pulled them off, then discarded his boxers. He positioned himself at Sam's entrance, then captured her lips in another kiss. He pushed into her and listened to her moan against his lips.

Cas started to thrust, going slow at first, then eventually started speeding up. He pulled away from Sam's lips and buried his head in her neck, letting out grunts and moans.

Sam moaned under him. Her breath hitched when she felt Cas hit in a certain spot. "R-Right there Cas."

Cas obeyed and adjusted himself to keep hitting the spot. He eventually became ruthless and just started pounding into her.

Both of their breaths picked up and eventually turned into pants.

"C-Cas! I'm cl-close!"

"Me too, Sammy..."

After a few more thrust, Sam closed her eyes and arched her back as she came undone under Cas.

The sight of her body withering, made Cas cum deep inside her as well.

Cas pressed his body against Sam's for a moment before pulling out and falling on side of her.

Sam looked over at Cas, panting. "D-Damn, Cas.."

Cas chuckled and smiled at her. "It was quiet enjoyable, Sam. Now, we have to get to work and try to change you back." He started to get out the bed, but felt a hand wrap around his wrist.

"No, Cas... Take a nap with me."

"Sure, Sam."

IT WAS SO HARD TRYING TO FIGURE OUT IF I SHOULD'VE USED HE OR SHE FOR SAM.

SO I SETTLED ON SHE.

In all honesty, this wasn't gonna be smut, but I couldn't resist!

I'm sorreh!