I'm not a writer but this inspired a short story.
One day as I was getting my children undressed in the changing room I noticed something unusual that got my heart racing fast. There at the back of the enclosed changing room was a rigid cock sticking through a hole in the wall, I was hunched forwards so it was now level with my face. "This wasn't here last time" I said in shock. I felt magnetized as I reached my hand forwards and gently pushed the penis away trying to deny my children from seeing it. 'That's a real man's cock in there' I said to myself. It felt huge and it was throbbing and pulsating in my slender hand, I tried to back away but I couldn't risk my daughters seeing it too. They were still too young! "Oh Shit!" I said under my breath. I was already pent up as I hadn't touched another man in two years. My pussy began quivering as I watched it lightly twitching up and down through the gloryhole, splashing precum onto my fingers as I caressed the tip. My breathing turned ragged as I tried to control myself, I needed to touch it, I needed to feel it, but I couldn't. My breathing only sped up as I felt the precum in my hand and I licked my fingers. It was salty sweet and musky, making my mouth water. My pussy was soaking wet. I could hear my daughters giggling between eachother as I tried to calm down. It dawned on me that I was being totally selfish as I should first get my children undressed and out of the pool complex. But that's not what I did at that moment, a part of me was rationalising how I could get away with it. That my daughters are so young that maybe they wouldn't remember if I took this chance to relieve myself, maybe they wouldn't notice anything was wrong if I just happened to press myself against the wall and let him have his way with me while I got them changed. I felt sick, but then it happened. My rational mind had no control over my actions, my body was moving on it's own to satisfy my sick desires. I quickly turned to face my children with my ass pressed firmly against the hole. Pulling my bikini to the side I felt the hard tip of his penis pressing against my pussy lips. He was thick and long and it felt so good rubbing between my thighs. With his throbbing cock head at the entrance of my pussy I spread my cheeks to make room for him. His cock started to enter me, the heat of him penetrating me from behind as my children were oblivious stirred something up inside of me. He pressed in to the hilt, toying with my other hole to match each thrust making me gasp out loud. My little girls turned to face me as terror and apprehension gripped my heart for a moment. I couldn't risk them seeing me in this state. I knew I had to do something, I couldn't just stand there forever. I had to forget about the man behind the glory hole. I started to undress my children as I was lightly rocking my hips, feeling my grip get tighter. I was stifling moans as I felt the precum drip down my swimsuit and start to pool on the floor. After a minute of this I couldn't look up anymore, I began feeling light headed and dizzy. 'I'm close, just a bit longer' I felt the tip of it swell and shrink over and over again. 'Oh my God, he's going to come' The feeling was too much as lightning struck my body, I wrenched his cock out of my pussy as a warm and intense wave of pleasure surged across me. I twitched from the afterglow of my orgasm and squatted quickly to pee, unable to resist the urge as the powerful flow drenched the floor with my juices. I didn't make eye contact with my children. In their confusion I quickly finished stripping my children down to their swimsuits and got them into the pool before rushing back to the cubicle. There it was, hard and thick like a piece of wood. I knew my daughters would ask questions when they saw my pussy leaking once they got out of the pool. I just wanted it all to be over, but I was still so turned on that I was shaking. Then, as suddenly as it had appeared, it was gone. The hole now empty. The end. You're welcome faggots, I hope I pissed at least one of you off with the ending.