When I was 20 I learned my first lesson in being cuckold to my girlfriend Pip. Pip was quite shy (so I thought) and sexually inexperienced having slept with only me and one time other guy. We'd been going out for months and more or less living together. Sex was ok but not great. We first met in our local pub where she was playing pool with some friends. I took an instant liking to her as she moved around the pool table. She knew I was eyeing up and after she won her game I asked if I could play her and she agreed with the wager who ever lost bought the next round. I thought it was going to be easy as I was a good player but I was completely mistaken as she cleared the table and I had to buy her drinks the rest of the evening.
When I said double or quits she laughed and said I was a loser and once again she cleared the table and I walked off embarrassed to be beaten so easily by her. But at least I got to chat her up and walk her to the taxi stand and arranged a date which lead to us becoming a regular couple.
So a several of weeks later after several dates Pip began to regularly visit my flat for sex. We always went to the local pub to drink, meet friends and play pool. Then one evening things really took a complete change in our relationship. We entered the pub, bought our usual drinks and went into the side room to watch people playing pool. There was some different guys in the room being noisy and getting drunk and one really tall guy in his 30s was dominating the pool table, as he won match after match.
I decided to put some money down on the table to play the guy and stop his run of winning matches. He looked me up and down, then at my girlfriend and winked at her as he slide his long bony fingers down his pool cue in a suggestive way which made Pip begin to giggle. I thought I'd better beat this clown before he gets too cocky. Unfortunately, I only managed to pot one ball as he finished off the black and won easily.
Then he invited Pip to play the next match and I though he's be in for a real surprise, knowing how good a pool player Pip was. She broke off and he stood behind looking at her nice round firm butt as she bent over the table. She wore a short skirt and black stockings, so he got a good view and so did all the others in the room at Pip's sweet round ass. She looked gorgeous as I also looked at her knowing she was my girl. But Pip stopped looking at me and started flirting with this tall guy as she minced around the table.
It wasn't long before Pip won the game and we all cheered but the guy wasn't deterred and said the best of three, which Pip agreed. Then he came over to me and whispered in my ear "if I win I get to fuck your girl... okay?" I was really surprised and muttered back to him: "and if you lose?" by which he replied "I'll buy you both a meal after the pubs close in a restaurant of your choosing."
I found myself nodding in agreement, thinking he had no chance of beating my girl. The second game was very close, but he won by one ball. But Pip still looked confident as she broke off for the third crucial game. She potted the first few balls, then the guy did the same until very few were left on the table until only a black ball decider. Pip walked over to me and asked me what the guy had whispered to me and I told her the wager by which she gave me a look of disgust. Then walked over to the table to take her shot at the black to win the match. Then she turned around as she bent over the table and looked at me and then totally fluffed her shot!
I knew she'd done it on purpose as she stood watching the guy pot the black and win the match and also my girlfriend. Pip walked over to the guy and put her arms around him and gave him a long sexy kiss as the others cheered and I went red in the face. I walked up to them both and told her I was going home. She said she was staying until closing time but would come back later. I went home and then nervously waited for my girlfriend's return.