In a reserve I used to like to go for walks in at an outer Melbourne suburb, I pulled into the carpark one day to find the car next to me had a couple in it in the middle of a blowjob. I glanced into their car and at first was puzzled by what I saw, as it looked like the chap driving had a black cat in his lap. I then quickly realised that this black cat was in fact the head and black hair of his girlfriend, and she was giving him a blowjob and had him entirely in her mouth and throat. I realised that in that compromised position they could not move much, so decided to open their door and join them to see if they wanted extra company. I opened the passenger door and saw the girlfriend visibly jump, clearly unable to see me and what was happening. The chap simply put a hand on the back of her head to keep her in the same position, and smiled at me and invited me to join in. I lifted the skirt of the girlfriend and slid my hand between her thighs, sliding it upwards to her pussy. She shuddered and I glanced at the chat to see it was OK to proceed, and he just nodded indicating she was fine with me joining in. I massed her ass cheeks with one hand and sawed across her pussy lips with the other, until I could hear them sloppy with juices. I used my fingers to slide inside her, and she responded by resuming her blowjob and the chap relaxed to enjoy it. All of us spent time in various positions enjoying each other orally and eventually fucking each other. The woman said it was a real turn on for her having someone finger her out that she could not see.