Back in the day I had a chevy impala with a large bench seat. Drive ins were still around. I spent some great nights there with my GF.

Afrer meeting a guy at a bar in his car in the parking I sucked his big dick and he fingered my ass.

I have had sex in a car many times

In high school with my gf at a lake in the back seat of a 71 dodge swinger. The best was with a different gf her 88 Datsun 280z we open the back hatch and she got on her back

I have tried it twice. Two cars. The first was in a porsche 911. Her car. In my opinion, it is not possible. I was able to the head of my cock in, but not really move. I should have fucked her next to the car. She did let me drive it back to town. I almost had an orgasm driving.

The next time it was in my car. 59 ford thunderbird. Big console, bucket seats front and back. My gf was pretty short and skinny and on her back with her legs folded up against the roof, and with my legs crammed into he foot well I was able to get my cock into her, but I wouldn't call it fucking. Just coupled together with a little motion.

I am told it works better with woman on top. I can see how it might. But after the miserable fucking experience I used the car to carry some blankets and fucked her on the top of the car, or along side of it. Lol.

I was having sex in my car with a girl, coworker, at 2am in a Pizza Hut parking lot when a flashlight shined in my car, it was a cop, made us put our cloths on, asked the girl if she was allright and consented to it,nthey told us we couldn't do that in a public place, so we went down the block to a hospital parking lot and finished, so uncomfortable doing it in a car, I was young, next time, I did it at her or my place, or just got a room. When your young, you'll do it anywhere

If it's not an officer I'd say continue and invite that person to join in.. Could be some real fun...

Good advice has been given but me........I love being watched so I will keep going no matter who is watching.

Depends who's in the car.
Some people may not be worth the risk.
Others are.
So estimate who's looking and go for it.