"Hey." he says. "Hello sexy." Jack cocked his head to the side. "What brought that on?" You smirk and roll over, causing your sheaths to brush. Jack hisses. You settle yourself on top of him. "What are you doing?" he asked, panting. In response you reach for the straps that connect the torso section of the costume to the rest. You unbuckle it and cast it aside. Staring at his naked torso you answer, "Isn't it obvious what I'm doing?" You lean down and lick a path from his navel up to his nipples. He moans and you grin at his reaction. "Like that?" "Yesss." He hisses and reaches back to undo the straps on your costume. He tosses the top aside and stares. After a few seconds he says, "You have no idea how long I've waited for this." "Believe me Jack, I have a fairly good idea." "Than you may know that I've wanted to do this for a long time." With that, he leaned forward and took you into his mouth and you lose all power of coherent speech. He was doing something incredible with his tounge. All of a sudden he stopped and pulled off. "What are you doing?" you ask. Jack smiled. "That's not all I want." He says. He then lays back down on the bed. "I want you inside me." "Really?" "Yes. Why do you think I got you hard?" He says. "Now, TAKE ME!" "Your wish is my command." You reach down, brushing the tail aside. You line your dick up with his hole and start pushing. Before long, you find yourself buried deep inside Jack. He pants heavily, eyes closed tightly. "Are you alright?" you ask, concerned. "Yes, I'm fine. Move, please." At that, he pushed against you. You start thrusting. The wet heat surrounding you is incredible. You hit something that makes him cry out. He leans up and kisses you. "Please, do that again." You angle your thrusts to hit that spot again. After one particularly brutal thrust, the knot pops into Jack. He gasps as you moan loudly. Reaching down, you take hold of his cock and start pumping in time to your increasingly quick thrusts. He crys out as he orgasms. His inner muscles clamp down on you and you follow him into orgasm. As you collapse on him, you kiss. Jack smiles as he trails his hands down your stomach and suddenly tenses. "Ah dude, something's wrong with you." You look down to see the line of hair that trailed up from your groin turn to grey fur. Other lines of fur were creeping up your torso. You look at Jack to see the same thing happening to him.