Service with a smile

This event occurred a number of years ago but will never be erased from my memory. My now wife then fiancée were working at the family business (petrol station) doing the grave yard shift, as the night was quiet we became somewhat horny.
As we kissed and cuddled my cock began to press hard against my jeans, my thoughtful and ever loving fiancée could feel my predicament and duly undid my fly to let my hard cock free. As she began to stroke my cock she knelt down to take my cock in her mouth. She licked and sucked my cock, her tongue sliding up and down, when a customer arrived.
My fiancée had become so hot and bothered she ignored the fact and continued to suck my cock, the customer unaware of what was happening. We manoeuvred so that she was out of sight from the customer.
As the customer came into pay, I shot my load into her gorgeous mouth, being the good girl she is, she swallowed, looking up at me as I gave the customer his change with a great big smile on my face.