Smaller

"Ahhhh! Fuck!" You yell, as feel your dick getting numb.

You grab your crotch trying to feel what was happening to your cock. You touch the fabric of your jeans but can't find the bulge that was there moments ago. You feel something pushing inside your belly. You feel very nauseous and on the verge of throwing up.

As you're on your knees trying to cope with your nausea. Your sister approaches you l, gun pointed to your head.

"What the hell are you doing?" You manage to squeak, almost throwing up again.

"Let's have a look at that dick of yours big bro." She asks teasingly. You start unzipping your pants not wanting her to use that gun again.