"Fuck, Barry." Derek tosses his head back and lets out a sound like a low howl, gripping Barry's hips hard enough to bruise. The vibration is enough to have his vision whiting out for a moment, and he fucks up hard into Barry as he leans down to bite at his neck. "I thought you wanted this to last."

His claws retract as he wraps his strong hand around Barry's leaking cock, spreading the slick fluid with his thumb before giving it a nice, tight stroke. His fangs threaten to sharpen, and he breaks through the first few layers of skin before he pulls away from Barry's throat. There's a nice bruise forming already and Derek lets out a possessive growl, licking across it before it can heal.

"I want you to come on me," Derek breathes out, snapping his hips up as he strokes Barry's cock. "You have to wait for me, and after I fill you up, you can come. I want it all over my skin."