Chapter Text
John made his way back to their room just before midnight. He'd chosen to do the salt and burn by himself because Sam had made a big deal about some history paper he had that was due tomorrow. He opened the door and blinked at the site that greeted him before closing it quickly behind him.
Sam had Dean in his lap with his hand stuffed down her panties and had her shirt wide open as he fondled her bare breasts. At fifteen Sam was bigger than Dean and easily dwarfed her petite frame.
John's cock sprung to life before he could formulate words.
If anything, Sam looked irritated at being interrupted.
"Just a minute, dad," he said.
John watched as Sam's hand moved in a small tight circle inside Dean's panties and his panting daughter keened out her release.
"That's four," Sam said into Dean's ear.
"Sam," John said firmly. "I think you better tell me what's happening here. How long has this been going on?"
John noticed that Sam's hand never stilled, fingers flexing and moving beneath damp pink satin.
"I wanted to touch her and she wouldn't let me," Sam said, managing to sound petulant.
Well something had obviously changed. Dean was not fighting him in the least. She was completely and utterly passive.
"What changed?" John almost dreaded the answer.
"I found a spell in your book," Sam admitted.
John closed his eyes.
"You put a spell on your sister," he stated. "What exactly did you say?"
"That when I asked her to play with me she had to say yes and she had to like it."
Dean looked like she was on the verge of another orgasm, pretty mouth open, head tilted back as Sammy fingered her.
Sam had essentially made his sister into a sex toy.
The kid took the ensuing silence to speed up his strokes and bring Dean off yet again.
"Five," he whispered into her ear.
"What're you counting?" John asked. He suspected but just wondered at the reason behind it.
"I like seeing how many times I can get her to come in a row," he said. "I think its part of the spell but she gets off really easy."
"Just how long has this been going on?" John asked.
Sammy shrugged. "A few days."
"What's the record?" John asked, taking a seat.
"Sixteen," Sam said proudly.
"Well," he said, impressed. "Let's go for seventeen"
John sat back to watch. There had been a growing distance between them for years that had only recently began to manifest in disagreements and regular strife. Perhaps this would ease that tension.
Sam started to show off after a while. Apparently he didn't need to physically stimulate Dean to get her off. He took her mouth at one point, holding the back of her head as he took his time plundering. John watched in amazement as Dean's hips fluttered and she mewled into Sam's mouth as she came from the kiss alone. He never would have imagined the site of them together like this would be so beautiful or arousing to him.
For his next display of skill Sam whispered some surprisingly effective dirty talk into his sister’s ear as she squirmed, apple sized tits heaving as she eventually moaned long and low, hips stuttering against Sam’s hand as she got off. Definitely spell related. But it was also very obvious that Sam got off on touching Dean in some way. His hands constantly roamed her body, moving over thighs, belly, breasts and of course that wide open cunt.
"Watch this," Sam said as he slapped at her pussy. John just blinked. Sam did it two more times, firm and quick, and Dean came hard and loud, practically surging from his lap. Sam's strong arm around her waist kept her from going anywhere.
"Jesus," John breathed, uncomfortably aroused.
"That was fourteen," Sammy informed him. "I'm gonna finish over here."
John watched as he moved Dean to the bed and took off her panties, pushing her legs back and open as he lowered his mouth to her parted lips.
Dean writhed liked a wanton whore, unembarrassed and unashamed. Also part of the curse no doubt. Sammy took his time, obviously enjoying himself, as she came on his tongue three more times.
When he was done, Sam wiped his mouth and joined John at the table, leaving Dean exposed to them as she caught her breath.
"Seventeen," he smiled at John.
John couldn't help but chuckle and after a brief hesitation he slid a beer across the table to Sam.
Sam looked surprised and then very pleased. "Thanks."
After about fifteen minutes Dean came out of her haze, tugged her clothes into place without seeming to realize they were out of place and demanded pizza for dinner.
Things went back to normal for the most part, except for those times Sam would get bored (or horny) and John would find him playing with an extremely submissive Dean. His favorite times were the long road trips where Sam would take Dean in the backseat. His girl was very vocal and she knew how to show her pleasure. John had to pull over more than once and get out, adjusting himself in his jeans.
On one such occasion Sam offered to have Dean suck him off.
"She's really good at it," Sam informed him.
"Uh, yeah," he agreed. Why wouldn't he? "Sure."
And damn was his little baby talented! It was a real effort not to just give in and fuck her face but he behaved.
Since he'd cast the spell on Dean, Sam's moods were much more stable. They didn't argue nearly as much and it felt as if the kid was no longer pulling away from him.
John didn't want to mess that up, so he let Sam call the shots.
END