you grab Mark and pushed him against a nearby tree, pressing his dick agast your own, and start to furiously beat both off one-handed. At first, Mark struggled to break free trying to get away from you however, you were able to hold him against the tree with your other arm and your body weight.
"no, you have to stop, do you know what we becom-ooooo god that....good" he began to object but the feeling of your dick agast his own, the smell of both of your seed leaking out and onto the other dick was too much.
As soon as he started to moan in bliss you know he had given in and you can put your other hand to use in building up the pressure in both cocks until finally, a burst of cum shoot up between your's and Mark's bodies, white sticky cum coated your's and marks chests and bellies. you were panting as heavy as Mark, a strong tingling sensation was running through your body like something is about to change. Mark turned his backside to you, brassing himself agast the tree shacking similar to you as he protected his anus to you.
you grabbed Mark as you entered him as you felt the start force begin to change you and mark, were you and mark become the same thing or different monsters.