A Step Mother's Sin - Ch. 2: Mistake Two, I Join Him - Sex Stories

A Step Mother's Sin - Ch. 2: Mistake Two, I Join Him

... placed his hand inside his gym shorts to stroke himself skin-to-skin. I know now, as I knew then, that I should have politely gotten up and excused myself at that moment. I should have gone to my bedroom, eliminated the temptation and masturbated in private. But I didn't. I would like to claim I do not know why I did not get up at that moment; but the truth is I was very, very aroused by this whole perverse situation. Despite all logic and reason to the contrary, I slowly reached down as Robert watched, spread my thighs ever so slightly, fingers between my legs, and touched myself through my panties. The gusset of my panties was very wet now, and my clitoris was very sensitive and erect. I watched intently as Robert arched his hips, raising his buttocks off the couch, and pulled his gym shorts down to mid-thigh, placing his erect penis in plain view. It was the largest penis I had seen, thickly veined, with a well defined head and a slight purple tint. I was estimating it was seven to eight inches, and was thick. It was thicker than the vibrator that I had in my night stand, which was the largest item to work its way into my pussy up to that point and time. The large veins encasing the thick rigid shaft gave Robert's erection a dangerous, sinister appearance. His cock looked like it could split a tiny woman like me in two. It was the largest erection I had encountered in my thirty nine years. I continued to massage my clitoris with tiny circles was I watched Robert stroke ...

... himself with increasing speed. I was on the verge of climax, but something was stopping me from crossing the line to orgasm. I could not make myself climax while Robert watched. I think I knew I should not be doing this, and my remaining conscience served as a barrier to my climax. But I remained right on the edge. Our breathing began to synchronize and became faster, deeper and more labored. I could tell Robert was approaching orgasm. I wanted to witness it. I wanted to experience my stepson’s climax. Suddenly, his loins stiffened, his pace quickened and he began to convulse as he ejaculated long thick strings of semen. The thick, white ropes of sperm shot up five or six inches from the head of his cock and landed on his abdomen and lower chest. I was in awe the way the white ropes just suddenly appeared in the air before landing on Robert. I realized that I had never actually witnessed a man ejaculating like this before. I was so aroused. I was amazed at the strength, volume and distance of his ejaculate. At least four very large spurts erupted from his pulsing cock. Semen covered his belly and chest with a gooey mess. The fragrance of the semen filled my nostrils. I had never been so stimulated in my life, yet I could not reach and orgasm. As Robert lay back panting and sated, I got up and said, “Don’t move, I will clean this up.” I went to the bathroom to get a wash rag. I soaked it in warm water and returned. His penis had started to grow soft; but Robert's penis remained ...