My wife is an idiot and for the past seven years has allowed me to physically punish my two step daughters. Even now that they are getting older and the oldest has started to develop she allows me to spank them. She doesn't know that it excites me and I never do it in front of my wife. Sometimes she insists that I punish them not knowing what I do. When they were younger I simply pulled down their panties and spanked them. In the last year or so I began by making them go to there room and let them wait for me. After twenty minutes or so when I knew they had time to think about it. I would enter their room, close and lock the door, and order them to take all their clothes off. Then I would spank them naked over my knee and somtimes while bent over their chair or bed. I never do anything sexual but the site of their bodies does excite me, especially the oldest one. They both are in tears just by the humiliation I impose on them and I know they both fear me. I don't know whether its the power I have over them or the sight of their nakedness or both that stimulates me the most. They never complain to their mother about how I make them strip naked before spanking them. Knowing their mother wants me to spank them they don't question or tell her how I do it. Somtimes when my wife tells me they were bad or got in trouble at school I will ask her how many swats they deserve right in front of the girls. This way they are assured my wife knows I'm going to spank them even though my wife has no idea how much I look forward to doing it. I often tell my wife I don't like to spank them but tell her its the best way to disicipline them. Why she trusts me so much I have no idea and I assume she doesn't realize how it excites me. Their father is a wimp and they only see him twice a year and if they did tell him what I do he has never told my wife. Awhile back my wife was furious at both girls when they stayed out an hour or more after curfew. I was at work that night, so the next day she told me about it and right away I said they deserved a spanking. When they got home from school that day I pursuaded my wife to tell them to go to their rooms and they would both get a spanking from me. My wife and I sat in the kitchen for at least a half hour talking, while they were in their rooms. I was anxious to go up to them right away but didn't want my wife to see me excited about it. So we just talked about how worried she was that they were out so late. I said to my wife, that even though I didn't want to, I was going to have to really spank them hard for what they did and she agreed with me. The whole time I was getting more excited about it. I went to the youngest one first and tried acting as mad as I could and ordered her to undress. Buy the time she was naked she was already sobbing and I spanked her harder then ever. When I was finished I wouldn't let her get dressed and told her to lay on her bed until I came back in. I then went to the oldest ones room told her to undress and scolded her the whole time while watching her. Even when she was naked rather than spanking her right away I just made her stand in front of me as I hollared at her. I could tell she was humiliated even more than when she was younger. Her breasts were developing and she had pubic hair. When I started spanking her I made her bend over her chair and pushed her legs apart. I spanked her til my hand started to hurt and she cried the whole time. Her rear was pink and red when I finished. She stood up to get her clothes but I told her the same as her sister to lay in her bed naked until I returned. I went downstairs I told my wife that I think they should get another spanking. I was so excited by what I just did I didn't want to stop. We talked about it for awhile and she approved. Again I lied and told her I really didn't want to but that they deserved to be severely punished. I sat with her and had coffee amazed at how naive she was. After twenty minutes or so I went back to the youngest girls room and went in. She was still on the bed naked and I made her stand in front of me telling her how much she worried her mother. Than I pulled her over my knee and spanked her again only not very hard this time because her cheeks were still red from the first one. When I went into the older ones room she was laying on her stomach and her rear was still blazing red. I sat on the bed and made her roll over and couldn't help but casually look at her body as I again told her her mother was angry at her since she was the oldest. She was blushing and put her hands over her vagina but I told her to put them at her sides until I was done talking to her. I had an erection but made sure she wouldn't notice it. When I told her that her mother wanted me to spank her again, she started to cry and begged me not to. I told her I didn't want to but her mother said she deserved another spanking. This time I made her bend over with her head on the bed. I started to smack her bottom and with my foot I pushed her legs apart. I could clearly see her anus and vagina from that angle. I knew she was humiliated and in too much pain to realize what I was doing. I finally stopped but sat on the bed and watched her when I allowed her to get dressed. During dinner neither of the girls spoke much and their mother continued to scold them. They must think their mother knows I spank them naked which I'm sure she doesn't. I often wonder why they don't tell her I make them get naked all the time, hopeing they never do. My wife has never even asked me if I spank them bare bottom and I'm not sure what she thinks. I don't know what her reaction would be if she knew I made them get naked before spanking them. All the times that I have spanked them never once has my wife came upstairs while its going on. I can't help the excitement it gives me and look forward to them misbehaving. Otherwise I treat them well and would never force sex of any kind on them. I do however take full advantage of seeing them naked. I feel bad sometimes knowing the humiliation I put them through but have noticed they are getting used to it. I try to act like I'm not interested in seeing them naked and often tell them it is just part of the punishment.