Fics like Problem with his Vessel

There's a problem with his vessel, or at least that's what Cas thinks... he keeps getting these stiff aching problems between his thighs! So what happens when he goes to Dean for a little help with said problems? Even worse, what happens when Heaven finds out about such "forbidden acts" between Hunter and Angel? Naturally, all hell breaks loose! Rated M for Smut and Language. Top!Dean, Bottom!Cas. Wings Kink. Angel in Heat. Please read the rewrite (ch 2 is up)

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