I was about 30 and single and Carla (my co-worker) was married to Harvey; they were both in their mid-twenties. She and I worked in an insurance firm in Newark, NJ in the 70's.
Let me describe Carla: about five feet tall, round face, round ass, round body and two huge round tits. We often called her 'BB' for 'Big Boobs' to her face and when referring to her amongst friends. And she was a bit of a free spirit.
Most people commuted via public transportation, and we got out of town as close to 5:00 PM as possible. It was not a place you wanted to hang around much later than that unless you had your car next to your desk. As his job required a car, Harvey frequently dropped Carla off at work and picked her up.
One day (a Friday) he called her to say that he was tied up and would be late. He suggested she take public transportation home. As it was, Harvey, Carla and I had planned to spend the evening together at their home playing cards.
Carla told me about Harvey's situation and suggested I join them for dinner, too, as it would be later when he got home. So we decided to order a pizza for dinner when we all got there.
Since I had to drive to their place from mine, I suggested that Carla and I take the train from town to my place, then I would drive us to there's. Sounded good at the time. Turned out better!
We got to my place at about six PM. I said I wanted to freshen up and change and went into the bathroom. When I came out I found Carla fully dressed lying on my bed which was a twin bed; I had a large sofa bed in the living room when I needed more room.
She said, 'Is this where you do it?'
I replied, 'Only when I am by myself,' and that brought a chuckle from her. And when she chuckled, she giggled and jiggled.
'So, how often do you do it by yourself,' she asked.
'Whenever I can,' I told her.
'What do you use for your stimulation?'
'Sometimes nothing, especially if I have thoughts of a gal at work or that I see on the train. And why all of these questions,' I asked her.
'I don't know, I guess I've gotten a little horny it being Friday, in your apartment, Harvey not here ..... Do you mind?'
'No,' I said, 'but later tonight I will think about you lying on my bed telling me you are horny, and that will get me really going.'
She looked at me with a sexy grin and said, 'We could do a little something about it now for a few minutes.'
I went over to the bed and leaned down to her and asked, 'What do you have in mind?'
'My slacks and panties are staying on, but they don't have to be all the way up,' she replied.
I kissed her on the lips and our tongues enjoyed a little dance as I reached for the waist band of her slacks. I undid the button and lowered the zipper to open them as she lifted her hips up off the bed and helped me slide them down to just below her ass.
I slipped a finger over her rather hairy muff and then veered off to the top of her thigh letting my hand slide down the inside of it and then up the inside of the other thigh. She parted her legs slightly and took my wrist in her hand and guided it to her wet slit. I had little difficulty in spreading her meaty lips and finding her already aroused clit with my fingers.
Carla then lifted her blouse and bra away from her mammoth tits exposing a rather small pair of pink nipples. I lowered my mouth to one as my finger rolled over her clit and dipped into her pussy. She then reached for my crotch and I broke away from her treasurers just long enough to quickly drop my pants and shorts. She grasped my rigid cock and said, 'Mm, bigger than I would have thought,' and began to slowly stroke it.
I returned my hand to her pussy wishing I had the guts to get my face in there, but I feared the whole thing would come to a halt if I did. If she wants more, I thought (and hoped) she will suggest it.
It wasn't very long afterwards that she got much, much wetter and started to grind her hips and pound her pussy up and down on my finger. Next she started to moan and whimper a bit as her orgasm began to overtake her.
She was still stroking my cock as she reached her peak. When she started to come down from her cum, she said, 'Now you, but you do it; I want to watch how you do it here when you are by yourself.'
I knelt on the bed next to her and aimed my cock at her tits. I stroked it in earnest working up to what I thought would be a very good cum, and a fantasy come true. Soon I felt that familiar feeling knowing that I was beyond the point of stopping, and not wanting to, either. I reached between my legs under my cock and began to massage my balls.
It was at this point that I noticed for the first time that Carla was caressing her tits and pinching her nipples. And that was all I needed as I suddenly saw cum fly from my peehole and land on one huge tit then the other and then on her hand that was squeezing her nipple. More cum rolled down from my cockhead onto my hand as I slowly started the ever disappointing downward trek from my orgasm.
We silently cleaned up, dressed, and got into my car for the ride to her house. Carla said, 'I am not sorry about what just happened, but I don't want it to happen again or ever speak of it.' I told her that I understood and that it would be a special memory for me. And it has been, and still is.