She knelt beside me as she explored the length of my shaft and fondled my balls. I raised up on my elbows and leaned over kissing each of her breasts ...nd sucking on her nipples as her hand slid up and down my cock send waves of pleasure through my body. I said "Have you ever sucked a guys cock before Tina?" She said "No, but I'm ready to try now." and she lowered her lips to the tip of my dick and began licking around the head as she stroked me. I layed back to enjoy the feeling of her soft. "Yes, fuck yes! yes! yes!" I groaned happily feeling my climax was near."Come on Sammy, cum for me! cum for me!" urged my stepsister now "Cum for me hard! Deep in my little pussy!"We were now fucking so hard and fast the cubicle was beginning to creak and shake, and her groans were now getting louder, and her mother glanced around nervously as she could see we were getting close to our orgasms."Oh god!" I then groaned "I can feel it! I can feel it! I'm almost there!" Yes, Sammy! Cum for me! Cum. A bit annoying as the tepid water got into my eyes, nose and mouth. I jokingly told her that giving someone that much attention usually suggests warmer feelings for that person. She stopped splattering me only to look me in the eyes for a few seconds before continuing with even more vigour.Eventually her arms got tired and she wanted to do the "catapult", where she stands on my shoulders with me submerged and I then shoot up to throw her like 10 feet up and away. Once while steadying her. “Oh god that feels good” she finally said and huffed as she began to feel an orgasm coming on. “Oh my god don’t stop”she blurted out “I am cumming”.so I spread her legs from my chest to see her pussy beginning to emit her cum.I hate condoms I was thinking ,sure they make it easier to slid in and out of her tight cunt ,but I couldn't feel her cum on my cock. I was surprised when I let go of her legs that she held them in the air for a while longer. It gave me the ability to caress her firm.