” We make sure all the doors are locked and the shades are drawn. We walk around the house checking everything. We end in her bedroom. She enters h...r room, turns on the light and sits on her bed. I stand at the entrance of her room taking in her beauty surrounded by her castle. She has a few stuffed animals and throw pillows on her bed. There is a chair with a reading lamp beside it. There is a desk and a book case that contains her books and a small black and white TV. A large closet is. I heard her when she came back in. Waking up, I noticed she was smiling, and she said, "Terry was down at the store. He pulled up right after me and came over to the car and said, 'What you doin' with that little skirt on, Honey?'" This didn't surprise me; Terry was always flirting with her, even when I was around.She said she told him, "Oh, just thought you'd like it". Then she said they talked for a few minutes and she got her wine and came on home.What I found out later was that Terry asked. In fact I had always been drawn to Katie and I am sure my wife felt my attraction for her sister, but always addressed our flirtatiousness to each other with a quick raised eyebrow and a “watch it you two”. Until today, Katie and I had never shared anymore than a quick wink or flirty remark. But that changed with our sharing some time over a box of her personal bedroom toys, panties and some racy pictures of her and a friend. She had gave me some alone time with the box and directions to enjoy. He gasped into my mouth as I wiggled it around, but made no attempt to stop me. We remained like this for a while, kissing passionately, our cocks grinding and my finger exploring his asshole. Then it was his turn to surprise me.Against my tongue's protests, he broke off our kiss and sat up. For a split second I was terrified that he'd reconsidered what we were doing. But instead of getting off me, he swivelled round. Then he lay down, putting his head directly above my throbbing penis, and his.