This was about a week before her sister was come and stay with us for the summer. I was so fucking horny the whole week that i fucked my wife all over...the house that week and thought about her sister.The day came when my sister in law arrived. She had tight jeans and tshirt on showing off her big brown tits and ass. I wanted to grab her right there and fuck her. Later in the evening we were sitting talking and having a drink. i was in the middle of them both. My wife said to her sister that. "We walked over to Tom's room and the door was open and I looked into the room and saw Gloria on Tom's bed. She was in the doggie with a white cock in her pussy or ass – couldn't tell from where I was standing – and a black cock in her mouth. There were four other guys getting ready to join in or wait their turn."She arrived at five-thirty, said you had told her all about what we were doing and she wanted to know if she could play too. She has seen your mom and the question is do you want her. It was obvious she wasn't wearing anything underneath and soon it was as if I had been hypnotized. I stopped paying attention to anything else and that's when she stood up, causing her shorts to pull towards her backside pinning me on the inside of her shorts.One wrong move by either of us and I could be squashed like...well, like a bug. I tried not to panic, hoping for an opportunity to get the heck out of there and that's when I felt her moving. As dark as it was, I could tell by her. "Abby looked up at Blake whose posture had finally relaxed a bit. Her eyes were sad and pleading at the same time. "I'm so very sorry..." she repeated. She stood up, looking him straight in the eye. "Will you ever be able to forgive me?"After a few moments of tense silence, Blake folded Abby into his arms. As they clung to each other, they both burst into a sorrowful weep. Dr. Markham left the room quietly, giving them time to deal with their emotions.It was shaping up to be a battle of epic.