She offers herself instead

After some period of thinking about something Carrie asks "But you want to **** me, Cassidy is just a backup option, right?"

"Right" You nod "But we agreed that it is impossible to **** such slut like you are. You will enjoy it disqualifying it from a true ****."

"Sure. But this is true for a regular ****. But locking me in a basement is a very different thing"

"How is so?" You must admit that having a place to go where Carrie will be always present is a great idea.

"I will enjoy it for the first time. For the first day. Maybe for the first week. But sooner or later I'll start hating it. Just imagine being locked in a dark place, no freedom, no social life, no entertainment, nothing but being **** again and again and again. I will start hating it for the real" There is a strange mix of emotions on her face. She is both excited and afraid of this perspective. "And locking me is much simpler than doing the same with Cassidy. I can arrange my disappearance in a way that will never lead to you

"Are you sure that you want this? Why?" She is indeed the most unusual woman you have ever met.

"Because I love you! And what to make you happy no matter the cost. Even that means giving up my freedom and happiness. " She says without even the slightest hint of doubt "I'll start looking for a suitable basement tomorrow. You will have a great sex toy for all your perverted fun!"