Chastity and orgasm denial discussion

I experienced the biggest embarrassment of my life yesterday with an ejaculation! My wife and kh have kept me locked up since early August, which left me incredibly horny. On top of that, she had me wearing a butt plug all day, keeping me right on the edge. We were at the store grabbing some items. I was holding a bag of charcoal for the grill while my wife piled things onto it as we moved along, leaving no room for me to lower my arms. I spotted two teenage girls dressed in tight silk shorts, tank tops, and flip-flops. They were stunning, and I couldn’t stop staring at them. In short, we ended up waiting behind them in the checkout line. The queue was crawling forward, and as I stood close to those lovely legs with their firm backsides, my arousal grew stronger. It seemed like they had just showered since a fresh shampoo scent filled the air. My sphincter and prostate felt tight around the butt plug, causing me to tremble. My wife noticed what was happening and subtly stepped back so others wouldn’t assume she was part of the scene. As my shaking became more visible, the girls ahead started paying attention too. They began whispering and giggling among themselves. Suddenly, I lost control and just stood there squirting into my trousers. It felt endless. The girls spotted the damp patch growing on me and burst out laughing hysterically as they finished their shopping and walked away still chuckling. My wife remained off to one side, also amused, while I rushed through checkout with the cashier trying hard not to laugh. Those two are likely sharing this story with all their friends now. Oh my goodness, what a mortifying moment!