By 1983 we were trying to increase our family, so we stopped our party going and meet ups and Penny came off the pill. She fell pretty quickly and soon had a nice bump out front and her normal small tits started to get a bit bigger. Penny, like a lot of women, got very randy when she was pregnant and after a night out she got very horny as we drove home. She was playing with herself and me as I drove. As it started to get darker outside she pulled my pants down and was stroking my cock and herself at the same time. Usually she would have lent across and stuck my cock in her mouth, but with a big bump on the front she couldn't get there.
From past experience we knew of a quiet layby not far from home and on the road that we were traveling. Penny urged me to stop there as she was very wet and really needed a cum. It was obvious that a fuck wasn't going to work but she would be happy with a finger job as long as she came. I was pretty horny too and fancied a hand job as well.
After about half an hour we reached the layby and I pulled in. It was previously a long bend in the old road so when the road was upgraded it left a quiet layby surrounded by trees and bushes but dimly lit by the adjacent street lighting. It was used regularly by young couples for a bit of outdoor nookie.
There were 4 or 5 cars already there but it was big enough that we could be discreet. Penny slid out of her knickers and I pulled my pants down to my knees and we kissed and fondled each other for a couple of minutes enjoying the moment.
Penny had just reclined her seat and taken two of my fingers up her pussy when there was a figure at the side of the car. We didn't mind. We were used to this and quite happy for people (Men) to watch us and sometimes join in. He stood there for a moment stroking his cock, which was a huge turn on for Penny. She loved to be watched. She undid her shirt and pulled her bra up over her ample tits and spread her legs as wide as room would allow. Pretty soon another figure appeared and then another. She looked very sexy. Her big bump, big tits, with very red nipples, and a swollen pussy making slurping sounds round my fingers. She was loving this, and it didn't take long for her to have her usual crashing orgasm as she squealed and bounced about. There were now four men outside all with their cocks in their hands. Penny sat up and had a good look at them. She then opened the door so either she, or, they could get a better look. "Hello lads", she said, "that's a fine display". There were chuckles and giggles from the men. She slipped her shirt off and unhooked her bra so they could all have a good look and one or two had a quick feel. She sat on the edge of the car seat with her legs outside and although her bump covered the view she was playing with her pussy. I thought I had better get round there in case any of them got too carried away, but they seemed a respectful lot. I stood with them and some remarked how lucky I was to have such a dirty wife. One of them asked if he could cum on her tits. I said 'Dont ask me, ask her'. He did and Penny giggled and lifted her tits up for him to put his cock against. He rubbed his dick furiously for a minute and with a grunt shot a load over Penny's boobs. She jiggled them up and down and spread the cum over her nipples. A second guy came in close and Penny said " Oh, you too. Come on then, let's see what you've got". He rubbed the head of his rather large cock over her slippery nipples and let go a massive stream over both her tits and some on her face. Pen was loving this attention "Wow", she said, "that's a huge load it's really hot too." The third guy now took a place next to her and number four couldn't wait any longer and went to the other side. The first shot another load over her tits and cum was running down over her bump making it all shiny. Finally the  young lad at her side shot his load but this time most of it went over her face. She opened her mouth so the final few squirts went on her tongue.
Now she was covered in cum it was my turn. I stood between her legs and dropped my trousers. Penny got hold of my throbbing cock and slid it into her mouth she sucked hard and rubbed it with her hand while I held on to the car roof. Some other men arrived but they were too late. They stood watching and wanking. Penny looked up at me and said loud enough for them to hear "Cum in my mouth darling let me taste your hot spunk" that was enough for me and I shot my load between her lips. There were a couple of grunts and sounds of satisfaction from behind me as the sight of Penny with cum in her mouth and on her face pushed others over the edge too.
As her audience shot their last she took some wet wipes from the glove box and cleaned herself up. She had spunky tits, a spunky belly, and a spunky face. She was very pleased with herself indeed. Some of the men drifted away but others asked if we would be here again, or could they have a phone number and things like that. Penny put her shirt back on and pulled her skirt back over her bump. I got back in the car and we said our goodbyes and left.
"Bloody hell," said Penny as we drove away, "that was sexy, did you enjoy that".
I had to admit that I did and I thought she was wonderful. "That's good" she said, rubbing my cock through my trousers. "Let's get home quick I want another fuck."