Your Mistress found your chastity device that you haven't been wearing for awhile and is going to put it back on you so you'll behave. She knows that it won't fit on you because your balls are too full so she jerks your cock just so she can empty your balls and make the chastity device fit, so you better enjoy it because it will be the last time you every get to cum. Then after your cock is locked away she pulls down her pants and puts her pussy on your locked-up cock just to torment you with the pussy you will never fuck.