When I was in high school my family took a trip to attend my sister's college graduation. I guess she wanted me to get a taste of university life so one night I was allowed to get away from the parents and hang out with her and her friends. After a few hours I was supposed to drive back to the hotel, but since I'd been drinking, my protective older sibling convinced me to stay the night at her place. In the morning, she and her roommates were rushing all around the house they lived in preparing for the ceremony and packing up their things. It was at this point that I realized that I had slept in a house with five, hot, sexy coeds. And I was wearing only my tighty whities under the blanket I'd been given the night before. I had the most outrageously stiff morning wood down there, and it would not go away.
So, my sister came into the little porch they'd had me sleep in to make sure I was "up". I certainly was, and I doubt I was able to hide it. Then she went off to make breakfast and told me to take my time getting ready. Well, there was only one thing I could do to make that hard-on go soft, but the space I was in was just too open for me to do so comfortably. I waited as long as I could, then finally just got out of bed and pulled on my pants as quickly as possible, doing my best to hide Mr. Happy by angling my erection over so it pointed toward the opening for the front pocket. With that, I walked into the kitchen, hoping no one would notice. Well, half hoping that and half hoping that one of my sis' gorgeous housemates would see how damn hard I was and offer to help me fire it off. The latter didn't happen, unfortunately.
What did was that my parents soon showed up. Filled with pride and wanting to capture the moment, our mom coaxed us outside for a picture together, which we posed for, one arm behind each other's back and facing the camera.
It wasn't until a coupe of years later that someone noticed. My oblivious mother had chosen that very image to put in a frame and display prominently in the hallway of our home. I had passed that photo multiple times a day and never gave it much thought. Then one afternoon my girlfriend was over at the house, and as usual we were having an argument. It shocked the hell out of me when she said, "You even get horny around your sister!!" When I asked her what she meant, my gal, who had plenty of experience recognizing when I was turned on, marched me over to the picture in the frame in the hallway of our house, and pointed to my obviously raging erection as I stood arm in arm with my sibling. "There!", she crowed. "You're hugging your sister and your dick looks like it's about to explode!!" And she was right.