Yes, you do.

You lose control. In that moment, you want it to happen, you want her to be the one, to be the one who took away an inch. And more importantly, you want to feel her perfect breast in your hand. After fantasizing about it so often over the years, it has to happen now, no matter what it costs. You both know, the moment you give in, you are going to cum, you will cum harder than ever before. But thats fine. Its worth it. She won.

With that thought in mind, the tension, the pressure, it all fell off from you, while her smooth, firm, soft and perky boob touches the palm of your hand, getting squeezed passionately in an explosion of lust and release. A wave of pleasure shoots through your body, progressing to a massive orgasm that you dont try to suppress anymore. Her hand tightens around your cock in excitement, she knows whats happening. Her eyes widen. She really did it. She made her brother cum. She seduced him into sacrificing part of his dick for her! Most men would give everything to have an inch more, but you are sacrificing an inch, permanently, just to cum for her and to touch her breast. She’s gonna really do it, fulfilling her fantasy, pressing the button. Her heart is racing just like yours. Your cum shoots all over her arm, even onto her belly in front of you. Your hand still squeezes her perfect breast, her hand leaves your dick to not interfere with the gadget. This second feels like eternity to both of you. Her finger is on the button, her lips move that last milimeter to finally touch yours. A tiny, soft kiss, to ensure you wont pull away. While you are still overwhelmed with the orgasming and the feeling of her breast in your hand, you would most likely be incapable of moving anyway, but her lips finally touching yours seal the deal completely. The only other thing you can perceive in that moment is the obvious excitement rushing through her body as she decisively presses the button. You know it, you feel it, you accept it, you just focus on savoring these last split seconds of feelings you have right now. You then feel the elastrator band tightening around your shaft, while the blade cuts off the tip of your dick. It happend, she won. You dont feel pain in that splitsecond, you just feel her lips leaving yours, you see her looking down, back up, into your eyes. Her eyes are sparkling, in disbelief that she really won, that she really managed to push you that far, that she is so powerful and you so incredibly weak for her. She’s glowing. She really did it. You will never be the same. You pass out.