“Am I doing the right thing?” you ask, catching your brother’s eye in the mirror as you check yourself over. 

“Yeah…” he trails off and then clears his throat, nodding his head. “Yeah, you’re doing the right thing. This is safe,” he reassures you, reaching out to stroke your arms. You force a smile at his confirmation, even though everything inside you was wishing he’d say the opposite. “You look… beautiful, sweetheart,” he adds. 

“Thanks.” 

You turn around to face him and take a deep breath, realizing just how handsome he is in his suit. He catches you staring and his touch drops from the top of your arm down to your hand, and the glint in his eye changes slightly. 

“We shouldn’t…” you insist the second you see the look on his face. “Dean, we can’t, I’m in my wedding dress, I’m getting married in half an hour.” 

“You’re still mine, right?” he asks, and while his voice is that tone deeper, a little more rasp to it, he’s also got a vulnerability about him that you’re not used to. 

“Always,” you confirm, nodding. 

Before you know it, Dean’s lips are on yours, and he’s licking into your mouth, pulling you tight against him. You whimper and hum against his lips, feeling the arousal starting to stir inside you, and you’re grateful you didn’t opt for one of those huge princess dresses, or the tight fitted ones that take hours to get in and out of. Your wedding dress is just the right cut that Dean can lift the skirt and expose your white lingerie to him. 

“You’re wearing this for him?” Dean asks, a flash of jealousy appearing on his face as he gropes your lace covered ass.

“He bought it for me,” you admit, your cheeks heating up. 

“How nice of him to give me a gift on your wedding day,” he smirks, pushing you down onto the hotel bed. 

“Dean, Dean, we can’t do this… I’m gonna walk down the aisle any minute,” you try to reason, but the feeling of his hot breath suddenly between your legs makes you forget your protest as you tip your head back and moan instead. He tugs the lace to one side and licks your pussy, sucking your clit between his lips as he hums. 

“One last time as a Winchester,” he implores, climbing up the bed and freeing his hard cock from his suit slacks. 

“Okay,” you relent, wanting it just as badly as your brother, and you nearly scream in pleasure as he pushes his cock deep inside you with one singular, well practiced thrust. “Fuck, Dean.” 

Dean growls, fucking into you hard and fast, tugging on the skirt of your dress, and you worry for a second he might rip it, but the thought quickly leaves when he reaches down to rub your clit, growling under his breath. 

“You’re mine, got it?” he asks possessively. “You better still want your brother’s cock when you’re married.” 

“Fuck, always,” you agree, the coil inside you tightening more and more with each thrust. “I’m gonna cum, Dean, fuck, I’m gonna cum.” 

“That’s it baby sister, cum on your brother’s cock.” 

Dean only fucks you harder, and your head starts to spin and as your climax hits, you clench hard around him, and he holds himself deep inside you, spluttering for air. 

“Not inside me, De,” you try to implore through your climax, but you don’t sound very assertive, and you know it’s too late when you feel the warm rush inside you. “Fuck.” 

“Fuck, I’m sorry, baby,” he pants, slowly pulling out of you. He replaces your panties and helps you up. “Need help cleaning up?” 

“We don’t have time,” you stress, looking at the clock and seeing you’re already supposed to be at the top of the aisle right now. 

You set about straightening your dress, and Dean kisses you softly on the lips once, giving you a sad smile. 

“You still look amazing,” he confirms. 

And you hope he’s right, and it’s not completely obvious you were just fucked to within an inch of your life by your brother, and now you’ll be leaking his cum while marrying another man.