"I promised that if you were good sissy this weekend I'd let you rub up against me as long as you wanted, I didn't say I'd unlock the chastity cage, though."
"But I'll never be able to cum if I'm still locked up."
"I know, sweetie, and you're just going to end up swelling and being sore, too, so I guess you have to decided if rubbing your little chastity cage on my pantyhose is really worth it."
Oh, she knows what you're going to do, she knows you'll rub against her, she knows you won't be able to resist, sissy. She knows. Almost like that was her plan, all along.