I had a burning desire to lift her skirt and feel her knickers pressing on me - but what if I was discovered? She might feel her skirt go up and then ...hat? Christ it was so ertotic I nearly passed out and I unconsciously undid my zip and put thumb and finger in and began to play with my cock. Then what do you think? I let it pop out erect as it was and I felt was going to come! All over her skirt! How delicious! Would I get away with it? I had to! My balls were bursting and I couldn't hold on. "Listenlittle Miss," she quickly snaps in a strict voice, "you will be wearingthis dress even if I have to spank you."I was shocked by her threat. Her tone alone was enough to halt me in mysteps. I wouldn't have imaged she'd put me in a dress so I had no way ofknowing if the spanking was an empty threat or not.As she lifts the opening of the dress up to my head, I automaticallystart placing my hands through the hand holes as if it was a t-shirt, butonce it falls down into place I realise what. Neither of them had ever experienced such hot and intense sex in their lives. The fact that they were committing incest, the greatest taboo, was such an extreme turn-on for both of them. Their bodies tingled all over as the sexual pleasures increased from the hot friction created between them. Her body was pulsating with a sexual energy like she had never felt before. She could feel the tears drying on her cheeks as her pussy quivered from the penatration of her brother's thick hard shaft. She. . it can't be any worse than letting a dog have sex with me." and she raised her bum up in the air again. I slid my finger on my sisters pussy again and slowly inserted it into her pussy. She pushed back against my finger and started fucking it. I did not move my finger and let her do the work."Does it hurt" i asked her. "not much" she repliedShe kept fucking my finger until she started rocking faster and faster. I took my finger out and said to her that she was ready. I then put my finger that.