I wonder... I wonder if I should just let you stay locked up for another day... another week... another month... Just think about it. How out of your mind with lust would you get, locked up for so long? And with only a single orgasm to relieve you, it'd be just as bad when I locked you up again... and that's what we both want, you as hard and horny and pliable as possible.
It's such an enticing thought... and I mean, it's not like you have a say in the matter. Why should I care how much you have to cum right now? Your relief is a minor inconvenience on the road to a truly excellent relationship. It only matters to me how well you obey me.