I had called my wife of 27 years around lunch time and told her I would be working late two hours, but actually finished on time so came home at normal time. I walked through our lounge heading for our bedroom to change clothes. As I approached bedroom door I thought I could hear the unmistakable sounds of her being fucked. I listened at the door for a few seconds and easily confirmed it was her since she is vocal during the build up as well as when she comes. It clearly was her well on her way. I had mixed feelings. The anger at being cuckolded hit first but right behind was lust as my cock began to get hard as I realized my long standing fantasy of watching her being fucked by another man was about to be fulfilled. I very slowly opened the door just enough to see in. The bottom near corner of the bed was only about ten feet away. I had an excellet view as I looked through the narrow opening. She was on her back wearing just a short sleeve shift that covered her upper body. She was naked from her waist down and was holding her chubby legs up and spread wide with her hands behind her knees. Her black fucker was knelt straight up with his knees right up against her bum thrusting his cock into her pussy with a steady rhythm. My wife was moaning '..... oohh ..... ummhh ..... aaahh ..... ummhh .....' as she worked toward a come. He was exhorting her to reach a climax with '... yeah ..... yeah ..... come for me ..... I want to hear you come again for me ... ' At that last one my stomach knotted. They had obviously been doing it for a while since he had already made her come at least once before, and maybe more. My 5 inch cock was now almost fully hard as I was very randy, so I pulled it out to rub and squeeze it. I couldn't see how big his cock was, but I was jealous anyway thinkng he must have a bigger one if she had already come at least once and was being worked her toward another one. My jealous thoughts were because I can only make her come once with my cock, and that only about half the time. The rest of the time she has to make herself come with her fingers whilst I come in her. Her moans now became deeper and more strained. She raised her head up a bit to stare hard up into his face. I could see she was very close. He sensed it and exhorted her some more ' ... yeah, that's it ... you know you want to come again ... you loved the other two ... see if you can make it a third time'. Oh fuck, I thought, he's already made her come two times and is going for a third one. How do I compete with that. No wonder she's fucking around on me.' My stomach felt sick, but my cock was rock hard with lust for my own wife fucking another man. Now he was fucking her faster and she was gasping '.. oh yeah ... oh yeah ... that's it ... just like that ... like that ... (now louder and quicker) .. ah .. ah .. oh .. oh .. (then louder and much more urgent) .. yeah .. yeah .. yeah (and finally a long one as she came for about 15 seconds) .aaaaaaaaaahhhhhhhhhhhh.' God, it was so erotic watching as she came on another man's cock! Then she was making diminishing moans as she came down for about 20 seconds '.. uuuuhhhh ... uuuhhh ... uuhh ... (and then the final) ..oooohhhhhhh.' He didn't come - just continued fuck her at a slower pace as she came down. I wondered if that was going to be it, but figured since I hadn't seen him come, she was going to get more cock. I was now fully into the 'cuckold watching' mode and couldn't wait to see her fucked some more. And they didn't disappoint. He pulled his cock out with one hand and rubbed and slapped her clit with the knob end for a few seconds to which she moaned and then said ' more ... more ... do me again!' He shoved his cock back in quite roughly with a sharp hip thrust and she gasped ' yeah! ..oh god, yeah! ... do it .. do it!' He fucked her the same way and in the same position with her holding her legs up and out with her hands behind her knees. However, this started to look a tad different. His hip thrusts were more urgent as he shoved his cock in deeper with much heavier breathing. All this while she was moaning first and then gasping as she quickly worked her way toward another come. To helpher along he was saying stuff like 'I love your pussy,' and 'you have a tight pussy,' and 'I love the way your pussy squeezes my cock'. Her head was now rolled back, eyes shut tight, and mouth half open as she moaned and gasped her increasing passion. She was rolling her head from side to side as she gasped ' you like to fuck me with your cock?' He instantly replied '.., I love fucking you!' She came back with ' then fuck me ... yeah, fuck me ..... aahh .. oh yeah .. come on, fuck me .. aaahhh fuck me ... (then with much more urgency) .. ah ah yeah fuck me oh oh oh oh ooooohhhhhh (as she came). This time he came with her but didn't make nearly as much noise as she did. His hips just jerked into her a few times as he made some deep moans whilst flooding her pussy. Then they just quietly fucked each other in a diminishing manner as they came down from the heights of passion. At the end he leant forward with her still holding her legs up and out and they kissed with some tongue. I was startled. My wife was actually tonguing a black man, but seeing it made me even more randy. I hadn't been conscious of it but I had been wanking my cock and was now quite close to coming, so I stopped. I had better use for my ejaculation than letting it spurt onto the floor in front of me. When they stopped kissing, I burst into the room. They both gave me a startled look as I roared at him 'you! out! right now!' He looked hard at me but said 'okay.' Then he looked down at my wife and said, 'sorry love, time to leave, maybe we can do this again some other time.' With that he got off the bed and gathered his clothes. As he did, I replaced him knelt right up against my wife's bum and pushed my trousers and pants down below my knees. She had lowered her feet to the bed but still had her knees up and thighs spread. She was still so startled she hadn't said anything - probably trying to think what to say to salvage the situation. I quickly rolled up the bottom of my shirt to get the shirt tails above my waist so they wouldn't get in the way of my cock and then said to her in a stern tone 'hold your legs up with your hands the way you did for him.' She meekly complied and I brought the knob of my cock to her wide open pussy entrance and saw his cum smeared in her cunt hair with some dripping out and running down her crack. I had always wondered what it would be like to fuck her 'sloppy seconds' with another man's cum in her. I now found out when I very roughly shoved my cock straight up her. It was like fucking into a hot sticky erotic swamp. I gave her two or three rough thrusts and found I loved the feel of 'sloppy seconds' in another man's hot cum. I was so randy from watching her get fucked that I fucked her hard and deep. As my passion rose even further, I shifted to fast pounding and quickly came, shooting a huge load (for me) of cum into her. When finished I continued fucking her for a few seconds longer as I milked the last dregs of my orgasm. I then dropped her legs and collapsed onto her body panting heavily. After just a few seconds she wrapped her arms around my upper back and squeezed her thighs against my waist. It felt comforting and I realized she was making an effort to re-connect with me as my wife. My anger was rapidly dissipating when she kissed the side of my neck. I raised my head and she reached up with her lips and kissed me full on the mouth. That rapidly turned into deep French kissing on both our parts and my passion quickly re-ignited. My cock was getting hard again, something I hadn't experienced for many years so soon after coming in her. When she felt my cock was sufficiently hard, she began rolling her hips to start me on the path to another orgasm. She milked my cock by squeezing it with her pussy muscles. I fucked her steadily as I rose up onto my elbows so I could watch her face as I fucked her. She stared at me and mouthed an 'I love you'. By now I was fucking her quite hard and fast. I soon grunted out my climax and thoroughly enjoyed a second orgasm as I added some more cum to her swamp of a pussy. This was amazing after so many years not being able to come but just once a session. After I came down from this second orgasm we kissed and then she said her first thing to me since bursting in on her being fuck by her black lover. She said, 'I assume you're not that angry with me any more. I guess we need to talk about this and decide what we'll do now.' I hesitated for a few seconds, but then said what I felt inside me, 'I should be so angry and leave you, but as you can tell, watching you with him made me so randy I couldn't help myself. So yeah, we need to talk.'