You decide to take the t-rex prize you won home after all of that and the lady is glad. But you two start to feel funny when you do. First James's butt starts to expand giving him a nice a juicy rear end that is better than any girl. Then the next thing you know; you have started becoming a clone of him at least body wise. You start getting a big butt and your muscles become big like his. Then, you gained t-rex features like a huge and powerful tail, the jaws, claws, and scales of a different color. And you feel no attraction to girls because sexy t-rex men with juicy butts are much better. So you jump onto the t-rex you won, and go to town on his now big ass. And you shift into tons of positions, and you love it. You want to stay like this forever. Then you cum into his ass, and then he takes a turn taking your ass. It is just as amazing as dominating this beast. As he just fucks you like no tomorrow.
"Man winning you was the best thing that has happened to me!", you say out of pure enjoyment of your new form and the sex you two arw having. Then he cums and you know he is yours forever because nothing can seperate you.