Shopping

This happened about 5 years ago when I was 18, my mum asked me to go to the local shop, I went reluctantly as I had been playing computer games and I still went after a telling off. The shop is only two doors down from our house and the woman who owns it, Mary, has known me since I was born (although she is just in her mid 40's). When I got there it was busy and after waiting my turn I was impatient and wanted to get back to my games, and I was a bit cheeky to mary, told her I was sorry but she looked at me and said that I should be punished for my cheek. she told me to tell my parents that I was going to help her move some boxes in the shop and to come back at closing time or she would tell my dad knowing him to very strict. After tea I told my parents that mary had asked me to help her and they said that was good of me to help her. I went to the shop for it closing at 6pm and she told me to wait till she locked up. We went into the back shop and again I said sorry but she said I must be punished, so I wondered what my punishment was going to be. she told me to strip down to my underpants and stand with my hands at my back, I said no but she asked if she should tell my dad,I told her he would not like what she had asked me to do but she replied who would he believe and I knew it would not be me. I stripped down to my underpants and put my clothes as well as socks onto a chair, all I had on now was a pair of white briefs and I put my hands at my back,I thought to myself dont tell me I am to be spanked , but no after looking at me for a few moments she put her hand on my buttocks and said nice and tight, a real boys bottom. She then took hold of the waistband of my briefs and pulled them down and I stepped out of them. She then started playing with my prick and balls and soon I was standing fully erect, 6inch uncut, she said lovely and was I ready for her to give me a wank, I said ok so she placed her fingers round my shaft and proceeded to toss me off, a few minutes later I told her that I was going to cum but she said thats ok and next thing I shot a stream of cum over the floor but she kept going. She stopped and gave me some paper towel and told me clean myself and then the floor, as I was crouching down cleaning the floor she slipped her hand between my thighs and squeezed my balls then told me to get dressed. I thought that was that but she told me to come back the next night and she done it again, this went on for nearly a week till finaly she said that I had been punished enough, I thought what punishment I had enjoyed it. After the last time she told me to get dressed but not to put on my briefs as she wanted them as a keepsake, so I gave her them. This happened about 5 year ago but I have been in the shop countless times since with never a mention of those events , till 2 days ago, I went in for juice and was a bit abrupt with mary, there was no one else in the shop , and she looked at me and said that although I was older and bigger she could still punish me, I said sorry and she asked me if I was any bigger and knowing what she meant said no just a bit more hair, she just smiled and said may have to see for myself. before I left she said look and she went into a drawer and took out my white briefs, and said still got them. When I went home I went to my room and thought back over what had happened those years back and had a wank thinking about it, maybe mary will have to punish me again.