When I was growing up my Step Mom came up with a system of punishment for bad grades. She would spank my penis with a ruler, she would make me pull my shirt up over my head cover my face then pull my pants down and I could not even see it coming. She would put her hand around my penis and run her hand under it until I started getting hard then whack it two or three times with a wooden ruler she had.

I got my grades up and she was impressed with that so thinking that would keep improving she told me that if I brought home a report card with all A's I could touch any part of her body that I wanted. I was pretty smart even back then and had a plan in my head to really screw her over. I asked her how long I could touch her for each A that I received and she looked back at me smiling and told me she would give me two minutes for each A but I had to have all A's. If they were not all A's I did not get anything.

After two reporting cards I finally did it and got all A's and she was really impressed and told me that she would honor her end of the deal and told me I could touch her for 2 minutes for each one. I had 12 minutes to pull off her swallowing my cum and I was going to finger her pussy as well. The next school day I ran home so that I could have a big window time incase she backed out of it but she was expecting me to be home quick and was already naked in her room. I walked into the house and she was calling me up to her room. I walked in and she asked me if I was ready to use my 12 minutes. I told what I had decided to do and she looked at me with her cheeks starting to blush. I told her that was going to touch her tongue with my penis, she looked at me for a good 10 seconds then said well now I guess I did not think this through very well.

She got off the bed and kneeled down on the floor and as I opened up my pants and she opened her mouth up looking up at me. I almost came in my underwear at the thought of my cum spraying in her mouth, I took out my penis and within 30 seconds was filling her mouth with cum. I could not believe she swallowed all of it down, she looked up at me and said that was fast, guess that was your first time for one of those. She laid back down on the bed and I started running my fingers all over her but I was being a little rough because she told me I had to be more gentle. I finally got my fingers in her and while she was good and wet I slipped them into her and started fingering her. She was pretty much into and I was watching the clock getting her all worked up and as soon as my time was up I stopped.

She looked down at me with an almost sad look on her face telling me I did not have to stop, I looked at her hips raising up and down and told her no, I only had 12 minutes and my time is up.

Three years later when I had outgrown her by a mile she never did anything to me anymore. My Dad left on business for a weekend so I came home from work on Friday night and she was sitting in the living room watching tv. I sat down for a little bit but then stood up and walked over to her. She asked me what was up and I grabbed her t-shirt and pulled it up over her head she struggled a little bit but then was pretty much submissive. I had a great time and she was moaning out loud when I was done pleasuring her.