Todd loved what he saw, so much he started to thrust his hips a little. Finally he let his underwear fall away to his ankles, where he proceeded to step out of them. He watched on as Carla continued to suck on Luis's big cock, both still clueless to Todd's presence at the door. Todd was slightly jealous that it was Luis's cock Carla was sucking and not his. He was also slightly jealous of Luis's size as well. From them showering next to each other at the gym, he had gotten familiar with Luis's cock size. Not that he was small in any way, being above average himself at 7 inches. He just wished he was bigger.
He started stroking the length of his cock to the rhythm of Carla's sucking on Luis's cock.
Luis then proceeded to pull his cock out of Carla's mouth. Carla looks up at him and says, MMM what are you going to do with me now Stud? Not wasting any time, Luis pushes her down onto her back, and pushes her legs apart into the missionary position. He then proceeds to rub the head of his cock on the outside of Carla's pussy prompting a moan out of her mouth. Luis could feel her getting wet as he continued to rub his cock on her, and pressing the head of his cock in slightly. Carla starts to thrust her hips grinding Luis's cock on her pussy even faster, causing her to moan even more. You like that don't you, Luis says. Fuck me you stud, fuck my pussy, cry's Carla.
Luis's finally slowly pushing his penis into her wet pussy, as he lays across the top of her and kisses her. More moans escaping her mouth between the kisses prompting Luis to thrust with even more force.
This finally sends Todd over the edge, and causes him to cum onto the floor. Todd too caught up on the lustrous sight in front of him to notice that his balls and penis have grown larger. His penis also grows veiner in the process. Normally being one and done, Todd is a little surprised when he is still hard and very horny but passes it off due to not cumming for a few days. He also feels a little warm, but passes it off as his horniness. But his attention is quickly brought back to Carla and Luis when he hears her give out a powerful moan, and he watches as Luis gives her a powerful squirt. Some of which managed to fly under Luis's balls and hit Todd. Sending Todd over the edge again.
Todd again was too distracted to notice his cock and balls changing again. This time not only growing bigger to about 9 inches, but also taking a darker tone. He also didn't notice the Black Stallion watching them through the window behind him.