Quoted By:
This happened to me about 8 years ago, I remember when I was 19 I was left at home alone and instructed to watch the house with my younger sister, who was 15yo at the time, as our parents had just left for the weekend. I told my sister I was going to play basket ball down the block with my bros and left the house but returned because I forgot my phone. She must have assumed that no one was home, long story short I was walking to my room when I heard strange noises coming from down the hallway. For some reason I could hear her crying, but there was another noise too, I could hear the metallic ticking noise of our dogs collar jingling. I giggled to myself and assumed she was just masturbating loudly like she always does when our parents leave. I briefly glanced through her slightly opened door, She was on the floor, was on all fours with her ass stuck up in the air, her pajamas and panties were pulled down to her knees and our families black lab was mounted on her back humping her so fast and crazy it was like jackhammer. Since the dog humping her was too loud she didn't hear my walk down the hallway. Thankfully her back was facing towards me so she didn't actually see or hear me, I paused in shock and awe and watched long enough to understand what was happening, for all of about 5 seconds, and ran to my room with the most awkward, strange, and shameful boner I've ever had. I never brought it up with her out of how fucked up and awkward that would have made everything.
