Yes

Your sister, unused to the pleasure her new dick can pump into her, is totally unaware of your reach until you grab the watch off of her wrist, yanking it over her hand. She notices too late, and by the time she starts to move, you already have it.

In a panic, you yell in your mind the first desire that comes to you: Stop! Immediately, your stepsister stops all movement, her body frozen rigidly in the middle of reaching down towards you. You briefly wonder if she's actually frozen or just unable to move herself, before the twitch of her dick in your mouth answers that question. Relief washes over your body as you realize you're safe, and the determination that had kept you from actively sucking dick breaks, and you almost involuntarily return to sliding your mouth along your stepsister's enlarged cock with reckless abandon. Pleasure sparks in your mind, arcing through your body. You thrust your ass into the air in vain, hands alternating between pressing and squeezing your tits and thrusting up into your panties to rub the lips of your pussy.

Time passes without you noticing until your sister begins to near climax. Her cock gives one final **** twitch before it begins to spasm, spraying semen down your throat. Your lips press together, working to pump as much fluid as possible from the two engorged sacks swinging below your sister's endowment. Finally, the splurts of jizz die down, and you are able to pop your lips off of the dick. You lay down on the ground, exhausted, a streak of cum across the side of your face.

Slowly, your mind begins to work its way out of the haze of pleasure. You notice that what had appeared to you as a watch is actually a nondescript metal band, totally plain. You grip it tightly in your hand as you wonder whether or not to put it on.