We made love to each other as she used her hips and pussy muscles to ride up and down my dick as I held her in place with my hands on her butt as well...as "return fire" with thrusts of my own. As time went on, our desire just got higher and higher until I felt her cum all over my cock! She twitched and tightened as her orgasm just rushed out of her body. I felt her body tightened and was turned on by it as I kept penetrating her to make the orgasm come forth. I felt her legs shake around my. It was something that would be too dangerous to our marriage, too hurtful to Andrew, and so wrong for me. But for some reason I didn't extrapolate the same results to Donnie.If I'm honest with myself, I think I understand my inner motivation. I was first. I was the one who met Andrew, who seduced him, who loved him; first. I suppose I've always considered myself to be first wife. It's selfish and I'm ashamed of myself. But it allowed me to suppose that what Donnie did outside the marriage. “Yes Sir, she said softly.As I said earlier, this break in our meetings gave me a chance to be more prepared for her today. I had gone shopping for a few necessary things and had brought with me a small gym bag full of goodies. I went out to the car to get it, while letting her stand there naked and bent over her table, thinking about what she was in store for.I came back in and set the bag down on the table right in front of her and unzipped it, bringing out the lengths of rope I was going to. She already had an erection and was inexpertly trying tojerk herself. She was unsure of the sensitivity of her new instrument.My heavy, unconstrained breasts swayed as I padded over to the bed andclimbed on, inserting myself between the brother and sister, facing Mel."Lie back," I ordered Mel, and she did so, stretching out like a big caton the bed. In Jase's body she was all bones and lithe muscle. I had herdick in my hand and was beginning to stroke its hot, smooth length as Icupped her balls.