As a Christian, Sam has a few reserves regarding the appropriateness of their ‘Priest’ disguises. But with Dean looking like that, and with his head stuffed between Sam’s thighs in the backseat of the Impala, he’s struggling to put up much of a protest.
Dean’s two fingers deep in Sam’s ass, relentlessly thumping and groping at his prostate in a way that’s making Sam’s toes curl up in his dress shoes. He’s lapping at the warmth there, at the base of his fingers, slobbery and insistent against his rim, taint and balls.
“Come on, Sammy,” Dean grunts- he’s panting for breath and grinning at up Sam’s disheveled state, spit shining across his chin. “Say a prayer for me?” He asks, all sweetly and cruel, before diving right back under.
God, it’s so wrong, it’s so wrong but it feels too good and the words seem to just fall from his lips. “Our father, who art in heaven, h-hallowed be thy name- fuck, Dean- t-thy kingdom c-come-“ Sam moans, throwing his head back against the car door as Dean shoves his tongue in alongside his fingers. “Thy will be done, on Earth a-as it is in heaven- harder- De, harder- fuck- give us this day our daily bread and f-forgive us our trespasses- as- as we forgive those who trespass against us.”
Dean’s laughing to himself, the vibrations of his voice flush and maddening against Sam’s rim.
“And lead us not into temptation, but deliver us from evil-“ Sam’s rushing now, frantic as his stomach tightens up. “F-for thine is thy kingdom, and the power, and the glory- fuck- fuck, Dean I’m gunna cum-“
Dean doubles down, wrist speeding up as he sucks a wet, sloppy sound into Sam’s taint.
That’s all it takes for Sam to burst, spurts of hot-white jerking from his cock to splatter his abdomen, Dean’s hair, and the bottom few buttons of scrunched-up vestment in thick fluid.
“For ever… and ever…” Sam pants, breathless, limp and heaving. “Amen.”