A Step Mother's Sin - Chapter 4: It Spins Further Out Of Control - Sex Stories

A Step Mother's Sin - Chapter 4: It Spins Further Out Of Control

... knowing my boy was going to try to fuck me 'bareback'. “No! Robert, no! We definitely cannot do that.” I was emphatic. I found an assertive tone I had previously not been able to summon. “Relax mom. It will be fine. I promise,” he said, arching his pelvis up in another attempt to enter me. Despite my trying to hold myself up on his shoulders, his large boner was finding its way past the first folds of my outer lips. I pulled up again, recoiling from Robert’s searching viper as it sought to enter me. “No, baby. I am not even on the pill. You cannot fuck me. You just can’t.” Robert tried to calm and reassure me, “Mom, I won’t cum in you. I promise. I just want to be inside you for a moment.” He began to lower me down again. I could feel the head of his penis searching again, only this time he found my opening. I was so wet, so aroused and so open, that the head of his cock was slipping inside me without any resistance. My wetness was making his entrance far too easy. I pulled up again. “No baby. Not like this. Please, not like this... at least let me put in my diaphragm.” I was almost crying now. The panic and fear were evident in my every word. With the head of his penis at the very opening of my vagina, actually just inside me a bit, Robert paused for a few seconds that seemed an eternity as I hovered over his erection. Robert then asked, “You have a diaphragm? Okay, where is it?” The constant pulsing of the head of his cock barely inside me was distinct. I wondered if he ...

... was leaking any seminal fluid in me while we were debating this issue. “It's in my night stand... please... it will only take a second! I promise, I will let you take me with it in place.” I pleaded with panic in my voice as I waited for him to decide. Would he impale me on his massive tool unprotected, pumping his seed into my fertile womb? Or would he allow me to protect him, and myself from a potential pregnancy that neither he nor I wanted, needed or could explain. After four or five seconds of silence, with the bulbous head of his penis throbbing just inside the very opening of my core, he lifted me off and set me down. “I guess I do not need my stepbrother and son to be the same person,” Robert said with a sly smile that revealed a confidence and cockiness which I found both unnerving and appealing. Thank God he had the good sense to allow us this protection. I realized that by agreeing to insert my diaphragm, there was no turning back now. I was going to allow my boy to fuck his mommy. I was now fully complicit. But fucking Robert voluntarily without risk of pregnancy seemed a far better choice than being taken by him bareback with the risk of pregnancy. I went upstairs with Robert in fast pursuit. At the top stair he grabbed me, turned me around with him standing one step below me and kissed me deeply again. With Robert standing one step below me, we were able to kiss more comfortably, our heights were now 'equaled' somewhat. His penis pressing and throbbing against my ...