This is sick shit, i cant belive you posted it. Parents shouldnt be allowed to fuck. next time your parents are fucking, sneek in the room when they aren't looking and hide under the bed. When they start going at it you start jerking off. Then just jump on the bed before you explode and aim your shit right at your moms tits and let loose and get cum all on her boobs, then turn around and put what you have left in your shot gun right on your dads cock, and then take a crap in the bed and run out. They will never fuck again after you do that. Or you could just start fucking your sister one day to get them back. Or just sit under the bed while they are fucking and rip some smelly farts and they will lose the mood when they smell your shit rising from the abyss into their nostrils.