Ok - not sure if you've been in a full-size van or not, but the front seats are separated and you can walk between them into the back. Our company van is a 15 passenger, but we've taken out the back 3 rows of seats so there's just one bench behind the front seats.
I swing by your house and pick you up at your request. I'm not sure where we're going, only that I was to arrive at noon on Monday and pick you up at your front door. I arrive on time and you're just heading out the door, ready to go. I unlock the doors, but instead of hopping in the front with me, you use the side door and get in the bench seat behind me. I offer you the front, but you pleasantly decline opting to stay where you are.
I pull away from your house and the conversation is light and cheerful like your usual self. You tell me to head for a park that you know of and give me general directions. As we're driving and talking, I notice you squirming in your seat a bit. I figure you're just getting comfortable and think nothing of it. Soon I begin to hear a wet, squishing sound but can't figure out where it's coming from. I ask you if you hear it too and you answer in the affirmative.
We discuss what it might be, and as we're talking I notice you lean forward towards me. I then suddenly see your dildo in your hand as you reach up and slap it teasingly across my face. I feel your juices on my face where it hit and smell your pussy on the toy. You tell me that you figured out what the squishing sound had been...
I look behind me to see that you must've been wearing a skirt that was easy to remove because it's now gone and you're sitting bottomless in the backseat. As quickly as I see it, you bring your dildo back from my face and slam it into your cunt again. I hear the wet squelching noise again and immediately recognize it from a few moments ago...
After a few deep plunges, you pull it from your pussy and bring it to my face again. As I try to pay attention to the road, you force it between my lips and I'm treated to the flavour of your juices coating the plastic toy. My head is spinning with your intoxicating flavour, but it only lasts a second before you plunge it back into your needy pussy. I can't believe you're fucking yourself in the backseat while I drive down a busy road in broad daylight.