I was visiting my mother for a few days as I travelled across the country. My mother had remarried after I had left home and her new husband had one child, a girl about 5 years younger than me. So not a girl now but a woman in her 30's. Janet was quite attractive. She had done college level athletics doing middle distance running. I think I heard she had a scholarship thanks to her talents.
We've been having a great visit but it has been busy so I said I was going to go grab a bit of a nap before the planned big dinner happened where some friends were attending as well.
I headed upstairs to the room I was staying in. I undressed since being naked is the best way for me to sleep. I was relaxing nicely but feeling a bit horny so I pulled out my phone and started listening to some lit erotica stories. A blind friend had showed me how to turn on a screen reading program through accessibility settings so I could actually listen to the stories and not have to read them with my eyes.
Soon I had found an interesting story and was now rock hard. I slid the covers back and started lightly sliding my hand over my balls and large thick penis. I startled because I thought I heard someone open the door to the hallway where the stairs were, by the front door. I listened carefully but didn't hear anything else so I assumed I was wrong. Of course, that reminded me I forgot to close my door since there was no one here that was likely to come upstairs. I decided I was safe and got back to my action.
The story was heating up so now I was laying on the bed with my legs spread wide, one hand (lubricated by my saliva) moving up and down my cock while the other stroked my balls.
In my story a gal was sucking this guy's cock while another gal was sitting on his face having her pussy thoroughly taken care of. I was lying pretty close to the edge of the bed with one leg almost hanging off. My eyes were shut as I stroked by throbbing cock.
I took a break from stroking to play with my nipples with my right hand while my left hand stroked around my ass. My eyes flew open when I felt breath and then a tongue on the tip of my cock! It was my step sister, Janet, with a towel around her hair and another wrapped around her body. I didn't describe her but she stood about 5 6 with an athletic build. She was curvy with some nice muscle definition in her legs and arms from her time in the gym. She has brown hair that goes about half way down her back and lips that make you want to kiss them.
I was about to say something but she stopped licking to put a finger to her lips in a shushing motion and then went back to licking me. She held my throbbing manhood in her hand and ran her tongue up and down the sensitive underside of my cock. Then she moved down a bit further to roll her tongue over my clean shaved balls. Trying to take them into her mouth but my sack was pulled up tight with my arousal so all she was able to doo was open her mouth wide over my large balls and continue licking.