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I stumbled upon a Halloween-themed sex party on the internet and couldn't resist signing up. As I arrived at the secluded mansion, I was filled with anticipation and excitement. Following the one rule of the party, I donned a mysterious mask and made myself comfortable in one of the lavish rooms, eagerly awaiting my mystery partner. After what felt like an eternity, he finally arrived. Our introductions were cut short as we both knew why we were here. With chemistry crackling between us, we began to roleplay our own scandalous Halloween scene. Each touch and caress fueled our desire, igniting a fiery passion within us. Amidst our passionate lovemaking, I begged him to call me "Step-mommy," adding another layer to our steamy encounter. We explored every position imaginable, lost in the heat of the moment. Finally, as he reached his climax deep inside me, I could no longer bear wearing the mask and hastily removed it. As he called me Step-mommy , I revealed my true identity to be the mystery boy, because the mask made me hot, which also took the mask off and I find out my step-son has been under that mask all along. Shocked and unable to comprehend the situation, I confessed that his step-father and I had been trying to get pregnant for so long, and we had agreed that I would have sex with a stranger during my ovulation - which happened to fall on this very day. With high chances of pregnancy now looming over us, my step-son and I were left stunned at the potential consequences of our forbidden tryst on Halloween night.