We sat in my car and waited for Mark to arrive. It didn't take long. When he arrived we got out of the car and I introduced them. We went along into t...he woods to our little clearing where Mark and I stripped down to our sheer pantyhose. I had explained that Penny was interested in seeing us playing together and Mark was up for it. We started by rubbing our nylon covered cocks together, then we rubbed them on each other's bums while reaching round and stroking each other. Then we took turns in. “Did it... Did it hurt?” I eventually asked. “You and I have never done... that sort of thing before.”I couldn’t bring myself to say the words; to point out that despite our adventurous sex life, she had never offered her anus to me. To my surprise, my wife flushed pink and her deep blue eyes flicked away from me towards the window.I understood the meaning immediately. The thought made me feel slightly sick and very jealous.“It wasn’t your first time,” I said coldly. “You’d done it before.. .that up" waving her hand at my c***, I was still rock hard and picked up my underwear puling them up, I stood there very obviously still hard, She sat there and looked up at me, her face beet red and wearing only a pair of pants and a t-shirt, She obviously had no bra on and her nipples were rock hard.She looked at me and put her hands up, she said 'I am so sorry, I didn't think you were here, You were supposed to be at work, I asked my daughter and she said you wouldn't be home till supper",. He looked at Brenda and asked are you sure? Are you ready? Again she said I love you and I want to be with you from now till we die. He smiled and took her gently by the hand and led her to his bedroom. In the bedroom. He unbuttoned her blouse and laid it on the floor. He unbuttoned and then unzipped her skirt and let it hit the floor. Brenda stepped out of her skirt. He knelt and removed her shoes and socks in her panties and bra. He stood and looked at her beautiful young body. She helped him.