Sometime during the claiming process both of them had climaxed, the physical explosion lost in the heat of the Claiming.  He still holds her, pressed high on the wall, wrapped around him.  His strong arms keep her there effortlessly as he scents over the new Claim mark, and licks it, knowing how sensitive it will be, a straight line to her pleasure centers.  A little side benefit of the Claim.  The demon purr-growls, seeing everything in very clear, very simple terms.  "Mine."