I live with my divorcée partner, Lisa. She is 36, 36d/25/36 and had her two kids quite young. The daughter no longer lives at home. The son was recently in a student exchange with a place in Germany. Lisa asked jokingly if I was happy for her to be left at home with a young man and I said she could have as many students as she could pull. That is where I should have thought about what I was saying.
In the 9 years we have been together we have had the odd dalliance outside our partnership, with each others blessing.
Arved arrived on the Friday, we showed him lots of English life over the weekend. I was working all the following week and Lisa had the Wednesday to Friday off to do our part in the group.
I got dropped off early on the Tuesday and let myself in. I could hear something from upstairs and went up. Halfway up I can see into the bedroom and there was Arved behind Lisa who was knelt on the bed, with his cock pounding in and out while Lisa urged him on, obviously a willing participant.
I had a good look and then went back out to return about twenty minutes later.
Arved was upstairs and Lisa said she would give me the details later when Arved had gone out to see another exchange student. There was more than had met my eye.
Lisa was home quite early that day and had done much as I did later. She spied Arved and his friend Karl on our bed, naked, wanking into a pair of her pants each, taken from the laundry. She thought about what I had said and moved quietly to the landing. There she took off her blouse and jeans before entering the bedroom.
Karl was in mid cum and could do nothing to hide it, Arved froze, and Lisa dropped her clothes in pretend shock. Having given them time for a good look, Lisa put her hands up in a calming gesture then sat on the bed between them, and spotted the picture from my side of the room on the bed.
Speaking clearly she explained that what they were doing was perfectly natural but using our bed, and her undies, was a bit much, but that she was, in a way, rather flattered! She then shocked them by saying if they could keep a secret they could have sex with a real woman if they wanted. After a pause, they both nodded uncertainly.
Lisa moved to the middle of the bed and removed her bra, telling Karl to close the windows she took of her pants and began to instruct Arved in the art of cunnilingus. Karl was then told how to make the most of a womans breasts. Lisa's are not so firm as they once were but are heavy and soft, and very nice.
Arved was soon allowed to slip his cock inside where his tongue had been working so well, and to his credit took two or three minutes to spurt his seed inside her. Karl was ready to go again and he lasted long enough to bring Lisa off before he too, came inside her.
Downstairs over coffee, Lisa again lectured the two on keeping the secret and then Karl was expected back at his digs.
Arved practically begged Lisa to take him back to bed and it was during his instruction on doggy that I got home and saw them. It can only have been minutes later that Arved came again, apparently giving Lisa an orgasm as he shot lots of cum into her.