We had been an item for the last 2 years, me, John, 55 and Kirsty 51, both of us free from restrictive relationships and content, mainly, with each other. We did not live together each of us keeping our own place staying over whenever, but both in the same area of town.

We are both mainly semi retired so we have plenty of time on our hands to pursue interests and spend time together. We generally please ourselves and don’t take much notice of those around us, friendly certainly but we do our own thing. When we first met I made it plain to Kirsty that I was, more than anything else, interested in a very physical relationship, fortunately, and much to my delight, Kirsty was of the same mind. She had spent the previous few years devoid of sex apart from the odd liaison when the opportunity arose.

Kirsty had kept her good looks, slimish, leggy and curvy in all the right places. She was to me a very attractive mature woman, I was instantly attracted to her and appreciated her fantastic sex drive once we ended up in bed.

For me I still go to the gym without being overly muscular, I keep myself fit and enjoy good health which fuels my also healthy sex drive. The attraction between us is both very physical and intellectual, so we got on very well and are very comfortable in each other’s company.

We are certainly well matched as far as sex is concerned, both of us highly charged as far as exploring and satisfying each other’s needs. We are very demonstrative and experiment with sex as much as we possibly can. Although together we have an understanding where, if the opportunity presented itself, we could have relations with other’s, as long as we explained and detailed the event to the other. During our time together this has occurred on several occasions for both of us. An open relationship if you want to put a label on it, which I don’t really.

Kirsty’s daughter, Susan, stayed from time to time depending on her work commitments, she was 21 years old, tall leggy, blonde and very attractive and pretty. She usually had a boyfriend of one sort or another in tow, but was young and in no need to settle down, as yet. Susan took after her mother she was confident, compassionate and very open minded. She was happy to discuss her boyfriends, their shortcomings as well as their attributes. She made no secret of the fact that she was fucking them and would happily discuss intimate details without seeming to be rude or insensitive.

Last week Susan had arrived on the Friday for the weekend, she had her own suite so she was really well self contained as we were in our Bedroom and en suite. There was no need to change our habits we were quite comfortable in our bodies and often appeared in various stages of undress, even nude from time to time.

That Saturday morning I came out of my bedroom dressed in my robe just as Susan came upstairs, we met at the stair head. Susan was wearing tight leggings with a figure hugging top with short sleeves, showing off her ample breasts, 34c I think. We exchanged greetings, “good morning Susan, how are you today” I asked. “I am fine John thank you,” she replied. “Are you thinking of getting dressed today then.” She teased. “Well I could get dressed right now but that would mean taking my robe off here and now, and I would not want to embarrass you” I grinned. “Oh I don’t think I would be shocked, after all nothing I haven’t seen before”

We stared into each other’s eyes, I could feel my cock starting to stir at the thought of her seeing me nude, her eyes were also so sexy with her come to bed stare, she knew exactly what she was doing.

“Of course that’s right how could I forget, you caught Kirsty and me recently in a very intimate moment when you came home unexpectedly, I hope you enjoyed the spectacle” She replied, “ yes John the sight of you fucking her was quite something, her on all fours as you took her from behind, very impressive, very erotic, she told me later how good a lover you are and how eager you are to pleasure her.” “Well she is a very sexy lady, very giving of her charms.” I replied.

The incident in question occurred the previous weekend, Kirsty and I had come home from a short trip to the shops, we went upstairs to try on a new shirt Kirsty had bought for me and as I was bare chested she cane onto me and we kissed passionately, I stripped her top removed her bra and sucked her nipples and fondled her breasts. My cock was hardening and she went down on me and took my manhood in her mouth expertly sucking my cock and massaging my balls. We moved to the bed, I was so eager to fuck her but first I massaged her clit and entered her with a finger, she came after a few minutes her hips bucking as the orgasm washed through her whole body. I was now fully erect and turned her over at the edge of the bed, I entered her pussy from behind and proceeded to fuck her. I massaged her tits from behind as well as massaging her anus which was so well exposed in this position. I know how much she likes the attention to her tits and anus when we fuck in this position. We always demonstrate our passion by talking during sex, “John I love your big cock inside me, fucking me hard, I want all your spunk inside my wet pussy. “ l would reply,”you make me so fucking hard Kirsty I love to fuck you I want to empty my balls inside your hot wet cunt.”