Pissing in public

Years ago me and my wife/mistress were vacationing in Hawaii. After an afternoon on the beach, we stopped at a convince store before heading back to our hotel room. She remained in her one piece bathing suit and I wore a mesh tank top and my trunks. As luck would have it, inside the store were two two beautiful tanned teenagers in bikinis shopping there as well. Our good luck continued when they ended up at the checkout counter ahead of us trying to buy cigarettes. The manager was being very flirty with them and kept chatting them up which was ok by us. Both young women filled out their bikinis wonderfully and I enjoyed staring at their perfect bottoms or an occasional glimpse of side boob. Suddenly one of them gasped and blurted out with urgency, " I have to go to the bathroom!" The manager thought this was a joke, but the girl insisted. After several minutes of the girl pleading with him, he reluctantly said the restroom was for employees only. The other girl joined in - insisting her friend wasn't kidding, but the manager didn't budge. The girl, embarrassed, couldn't hold it any longer and we watched as piss began to run down her leg. The manager was outraged and that girl was near tears due to embarrassment. She couldn't apologize fast enough. But her friend was also outraged, and in moments, with a sense of solidarity - she began to piss on the floor too! Suddenly I ejaculated a burst of jism through my chastity cage which immediately stained my trunks. In seconds i felt the ooze of my precum sticking to my inner thigh. Having been kept in chastity for weeks as well as being teased and denied on this vacation, it was unexpected but inevitable. I stared down at myself at the jism spreading across my trunks and glistening against my inner thigh. I whispered to my mistress, but she was still captivated by the sight of two teenage girls pissing on the floor, oblivious to my predicament. Soon both girls left, but I think the first one noticed my embarrassment and gasped as she walked by us. Only then did my Mistress notice why. Annoyed with me, she walked up to the counter and paid for our purchase, but she also bought a pack of cigarettes for the girls. But by the time we were done however, the girls were no where to be found. Only when we were outside did she become aware of the extent of my dripping! Of course I was punished when we got back to our room. But ever since that day, I have had a piss fetish. I haven't thought about that incident in years.