"Toy" with her some more.

You jump onto an online sex toy store and select a red leather collar with a gold chain leash. While you're there, you decide to pick up an extra goodie - a large magic wand vibrator with hundreds of five-star reviews. The wonders of online delivery mean that the discreet box is on your doorstep the very next day, and you rent a room in a motel on the outskirts of town by the highway and tell Gemma to meet you there early in the morning.

She arrives as instructed, with the expectation that you're going to finally fuck her, and lies naked on the bed as you blindfold her with a black cloth. You tie her wrists and ankles to the legs of the bed with some lengths of cord you had lying around in your shed. You admire her spreadeagled on the bed for a moment, before stuffing her panties into her mouth. She flinches as you take out the vibrator from its box and press the enormous head against her clit, before strapping it to her thigh with some duct tape. You flick it on, and immediately she starts to moan as vibrations ripple through her body.

"Enjoy yourself slut," you whisper into her ear, turning up the vibrator to maximum intensity.