Your brother, Will, is 18 years old. He’s 6’ 0” tall and has dark brown hair. You follow him to his room and watch as he takes off his shirt revealing his muscular chest with big pecs and defined abs. You close the door behind you as he pulls off his pants and underwear. You have never seen Will’s dick before. It’s average length and girth with egg sized balls. He’s hard and it’s pointing up and away from his body.
“I want to make love to you” Will says “I want to be inside you.” The idea of your brother fucking you is too much for you. You move towards him and swiftly and forcefully knee him hard in his balls. As Will drops to the floor you kick his penis a few more times before you run out and get a different pair of shoes. You change back into your shoes. The transformation finishes just as a naked Will comes out of his room. “Where is she?” He screams “I'm going to kill her.”