Sister fucking

John heads towards his sisters room. His balls now reaching his knees. He peers into his sisters room, his sister sitting on her bed naked furiously fingering herself. She pants as she starts to reach climax, John bursts into his sister’s room. His sister rushes to cover herself “John!? What the hell?!” John grabs his sister before she can cover herself fully. “Don’t worry roslyn, I will help you with this~“ John purrs to his sister. Roslyn blushes as she sees John’s massive double cocks. “What the hell?! We’re..how?” John snaps his fingers, John made it so that when he kisses, or makes intimate contact with another person his balls will swell based on his partners desire to get impregnated by him. As Roslyn try’s to speak John shoves one of his massive cocks all the way down Roslyns throat and strokes the other one with his free hand. As his sisters eyes go wide and she gags on his massive member as his cocks get harder his balls start to rapidly swell up with more and more cum. John starts to thrust his semi hard cocks in and out of Roslyns bulging throat. “Damn sis~ never knew you would want to get pregnant this bad.” After almost 3 whole minutes of rough face fucking John’s cocks are now fully hard standing at 56 inches long and 5 inches thick with balls the size of 2 yoga balls to match. John removes his fully erect cock from Roslyns mouth, as his cock slides out of Roslyn she try’s to keep his cock inside her mouth. John finally pulls away. John looks at his sister trying to put his cock back inside her mouth. John now has a choice to make