The bet, all in all, is pretty simple: every night for the next three weeks, Carrie has to play to the tapes Darcy gives her. If Darcy can prove that they had an impact, she wins. If she can't, Carrie wins.
And, honestly, Carrie is looking forward to the hundred bucks.
It helps that she's always been a good sleeper, so she only gets about five words into the first tape before she's out. But that's fine. It's not that she needs to listen to them, just that she needs to play them.
She goes a week certain they're not doing anything at all. She masturbates, turns them on, and then goes to sleep.
And then, partway through the second week, she wakes up in the morning with one of her dildos in her cunt, her own hand holding it there.
She thinks about not listening to the tape the next night but, well, a deal's a deal. And it's probably a fluke.
And then it happens the next day, and the next, and when she moves all of her dildos to her bathroom she wakes up with three fingers fucking her cunt instead.
She tries not to turn on the next tape, but she can feel herself reaching over and switching it on, and then she's out.
That morning she wakes up on her hands and knees with her pillow between her thighs, humping it until she cums.
Heading into the third week she has no control over whether she turns on the tape, and she has no control over what she's humping or rubbing or fucking herself with when she wakes up.
And then, on the very last day, she wakes up with her fingers deep in her cunt, humping her hand, trying desperately, desperately to cum.
Darcy comes into her room an hour after she wakes, when she's still teetering at the edge, tears welling up in her eyes as she can't manage to tip herself over the edge. She says, "I think you lost the bet, sweetheart."
And then she leaves Carrie to her desperation.