I had my knees as close together as I could get with my hands between them desperately trying to hide the erection the conversation was causing. Sudde...ly my sister began to cry and I thought a reprieve had been sent from above."Why don't you wait here a few minutes while I get your sister and then we'll talk more?"I instantly knew it wasn't a request and I simply nodded my head and waited. Mom didn't take long before she was back carrying my sister. She sat back down and without looking at me. I arrived at 11.00am and left at 14.30. I had given permission for another to be present and photos to be taken if required. Well the session started in a similar way with me and him. He had a whipping post installed and decided that I would be tied to it. This restaining was quite tight, with my arms extened and secured in front of me under some tension. My balls were also tied to the post along with my ankles. I was very tightly secured and he started flogging me lightly on my back. At first. After which i rushed home, i had a spare key,, i opened the house & went in & to my shock i found eliza sitting on the sofa watching some movie & heard some sounds from my parents bedroom… Eliza was shocked to c me… When i rushed to my parents bed room i saw eliza’s sister lying naked on the bed & getting bangged by her father… He saw me and was sort of embarrasse.. Elizas sister rushed out of the room after seeing me…he father put his pant and came to me and said sorry sir… I was in full heat. She kept whining, “No, no Shravan, I am your mother, we can’t do this.” as he continued to jackhammer into her over and over. Soon, her whining turned into more moans and her pushing on his chest to get him off eased to her hands on his sides and then to his ass to pull him deeper into her. She had always thought Rahul, her husband, was great in bed and never had any complaints.But this, this was something different; she had never been fucked like this, never. She was torn by the pure passion.