You do

“Cassidy...” You approach her, and here eyes widen again in fear. “I know tonight’s been hard on you, and I know you’ve probably got a lot of questions, so I’m going to take this gag out and we can speak. There’s no point screaming, we are in the middle of nowhere and I’ll put the gag back in if I need to. Understand?” She nodded hurriedly. “Good”, you say, as you remove the panties from her mouth. “W-w-why?” She whispers, her voice cracking. “Because you look like Carrie, and I want to **** Carrie. Only, she’ll do anything I ask her, so it isn’t nearly as fun.”

She cries a few more minutes before composing herself. “So, um, if you let me go I won’t tell anyone. We can just forget this? You had you run and did what you wanted right?” Her voice rises in desperation as she speaks. “I’m afraid that won’t be happening. This.” You gesture to the room “Is your new home. I’ll be visting often. You sister too! In the meantime...” -You jam a vibrator inside her and place another on her clit. “I have some business to attend to. The manacles open in two hours, at which point you are free to move around your room. Until then, have fun!” As you leave, you turn up the vibrator setting, causing Cassidy to writhe on the bed, convulsing with stimulation. Carrie pulls you close as you exit the room, her heart beating quickly. “That was the hottest thing I’ve ever seen! I’m sooo glad we did this to her! The really is the best thing for everyone. You have your perfect toy, I have you, and she doesn’t have to worry about anything forever, just getting fucked by my perfect man.” You smile. You have even more plans for Carrie, and her cumdump sister.