Yes!

You cant resist. At her command, you put the elastrator band on the cutting device, which holds the band open. She moves her sexy body seductively and says: “Do you want to jerk off to me?”. You can only nod. She continues:”Jerking off to your own sister is dangerous. I know you want me so much that you would risk that. I want to know exactly how much more you would risk for me. Lets increase the danger. The button on the cutting device holds the blade AND the elastrator band open. If the button is pressed, the band would constrict around whatever is in it, and the blade would rush down, cutting off whatever is in there. If your dick would be in it, the band would close around your shaft and stop you from bleeding out, while the blade would cut off the tip of your dick.” You are visibly shocked. She continues: “Now my goal is to seduce you to put your dick inside. I wanna see in what danger you would put your dick, just to stroke it for me.” You say: “But you wouldnt push the button, right?” She says: “Only if you cum. As long as you dont cum for me, you are absolutely safe. Its just the perceived danger. Are you in?”. You are still semi-hard, but you hesitate. This is risky. She looks deep into your eyes while unbuttoning her blouse slowly. Your dick immediately rises to full erection. She opens it completely, not taking it off though. You see a glimpse of her bra. She tells you in a seductive voice, that the closer you get to the cutter, the more she will reveal and the sexier she will move. You think, as long as you are not inside that hellish gadget, you are safe, so you move closer. She moves her body seductively, grabbing her boobs, grabbing her ass. You are in heaven. She slowly moves the blouse over her shoulders, about to let it fall. With every centimeter your dick gets closer to the hole of the cutter the lower the blouse glides on her arms. You are directly in front of the hole and you realize, if you want her to drop it, you have to put your dick in a little. Just a centimeter. She looks at you in anticipation. “Do it” She says. Shes too far aways to press the button before you can pull out. Still, its dangerous. She says: “imagine you are entering my pussy”, while she simultaneously, slowly moves her hand between her legs.