I Walked In..

My husband Dave was throwing a football party for the games. Dave usually gets with our brother in law to catch up while they prep before. My twin sister is usually with him but I noticed she wasn’t. I asked my brother in law where my sister was, his response, she was at home getting ready. Our son had left the house a few minutes earlier to go to his friend’s house. I didn’t want to be around guys all day, so I grab my keys and make a quick trip. As I’m pulling in I notice my son’s car in the drive through. I don’t think much of it, my son has been over to play with his cousins before. I call my sister but the house is empty, and I can hear the shower and music. I figure she must be taking a shower, I’ll ask her where my son is.

As I’m walking towards her master bedroom, I freeze. I hear these loud moans, sounds of splashing, and pleading. I’m nervous, I don’t know why, a lot of things are going through my head. The door to her bathroom is open, they have a huge vanity mirror that covers the wall. In the reflection I see my son, pinning my sister to the glass shower. Her tits flat on the glass, he’s pummeling her like a slut. I’m coming baby, I’m coming, come in my pussy, baby. His hands are all over her, grabbing and squeezing. I’m in shock, my sister and I are practically copies of each other. she has kept in better shape, she runs a lot but we still look very much alike. I don’t know what to do, I could’ve yelled. Instead I hear my son, you like that dick? You like that big dick? I’m gonna tear your pussy apart, take this dick. Get on your knees, suck the tip. I’m completely grossed out, I wanna throw up. I tip toe my way out. I can hear the sounds of my sister choking, laughing and giggling. I sat in silence the whole day. When my sister and my son showed up I ignored everyone. I felt like the world was closing in on me. Idk what I could’ve done but I didn’t want to think about it. I just told my husband I wasn’t feeling well. All I could think about was my son fucking my sister. Their voices, and how they were in ecstasy enjoying it. I still don’t know what to do. I’m scared his uncle is gonna find out and go crazy.