No, you make your own rules.

"I appreciate the offer." You say, "But I think I have a better one."
"Oh?" Lydia looks at you interested.
"I wont wear a cage, yet I´m willing to help you out. I mean, isn´t that better for John as well? He´ll know that I´m not just in it to fuck someone, because I can do that elsewhere, but that I´m really there to help you. What do you think?"

Lydia thinks for a moment than she nods. "Agreed, that sounds logical. Although I would have liked to see you in that cage. Well, maybe having one man locked is enough for now."

Then she comes closer to you, laying the box aside."Now, lets talk business."