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I am the librarian at the University that my step-son attends. My step-son sneaks off to meet me in my office during his lunch or on his breaks. We’ve been having an affair at the school. One day my step-son is in my office and he forgets to lock my door. He has me bent over ny desk, doing me from behind, when another students walks in on us. It’s my step-son’s best friend looking for my step-son. He threatens to tell the school and my husband about what he just saw unless I let him fuck me too. So I ask my step-son to leave my office and I give his friend exactly what he wants.