Loudly!

In a brief moment of ecstasy, you forget where you are! As the cum begins to spray out of your dick you moan out loudly! "Ooooooh fuuuuuuuck!!" You're so lost in your orgasm that you don't even notice that Sarah's head has snapped in your direction! She quickly heads towards the closet and rips the door open to find what made that noise... Your mind snaps back to reality as you find yourself staring at your sisters shocked and angering face looking back at you...