[Lovethenights]

Very interesting story, with some still unanswered questions. I agree that given all of the heavy petting that had gone on during the evening with the other man's fingers working your wife's personal anatomy over, that might have been when he'd have expected you (or her) to draw things to some conclusion if neither of you actually planned or wanted your wife to have an orgasm. Your wife's clouded memory of the evening also begs a question about whether she may have been more than a little encouraging to him to keep doing something to her that obviously felt awfully good to her. If your wife has any inhibitions about not having an orgasm unless you can have one too, or had any inhibitions whatsoever about you watching her getting such adroit and pleasing internal sexual attention, then when you left the room, your absence may have caused her or allowed her to have what sounds like one of the most explosive and shattering orgasms of her life. She may not even have intended to until you returned to the room but may have been swept away on a tide she couldn't control.
True, from your point of view that situation is a little disappointing, as I know you'd have preferred her to have that convulsion of sexual release with you beside her and able to share it with her. On the other hand, your wife had a great orgasm, you got to experience the excitement and eroticism of seeing and hearing her getting manually stimulated inside of her body all evening, and nothing that was said between you and the other couple makes it sound like you guys won't have many many great times together in the future, during which, if your wife is really lucky, she'll have the same kind of orgasms over and over and you'll get to indulge yourself with his obviously exciting wife. Make the best of the situation, not the worst. I am jealous of you and would love to introduce my wife to your friends!!!