Bucky cries out in absolute bliss, feeling the knot swell inside of him, causing more slick to practically gush out of him as he completely gives in to his heat, letting the alpha fuck him into the bed. He lets out a long whine as he rocks back into Steve, though with the knot inside of him, movement is hard; doing anything but trembling and whining for his alpha's cock is hard.

"Oh gods," he moans, "It's so good."