Hearing her call for him, he quietly goes to his room and stashes the balloon away in his top dresser drawer for later. He wraps a towel around his waist and walks to his sisters room and places his hand on the knob. He takes a deep breath and releases it, acting like he didn't already know what was going on.
He slowly opens the door and says, "What did you need help wit.....?" he stops mid-sentence, trying to give the impression that he was not expecting to see what he did. She sits up and pulls him onto the bed, removing his towel as she pulled him. She runs her hand down his body to his cock, and looks down at it surprised at how it looks. She pulls him closer till his cock is resting against her now older pussy. "Please help me with this." she says to him. Not needing to be told twice, he presses into her, slowly starting to fuck her. As he did that, his hands slowly moved to her breasts and started groping her enhanced mounds.