Your partner is waiting for you at home?
Put the keys into an envelope.
Then go home and tie and gag you unchanged in the bedroom, so that you can neither speak nor see. Use your panties in our mouth with tape as a gag and your handcuffs to bind your hands.
When you come home you will give your man the envelope with the keys and a small letter with instructions. This letter is written from your tease-partner and tells your man, what he can do with you tonight.
Of course you do not read the letter and give them directly to your partner.
And now back home and enjoy the night.