Failure

Here's the thing, when she unlocked you and told you that she was worried you'd cum too soon (after a month in the cage) so she'd only fuck you if you could last at least a minute with her stroking you (or else you were back in the cage for another month)...

She knew you'd never do it. She absolutely KNEW it. And the same thing will happen next month, and the next, don't you get it? You're never going inside her again.