When I woke up the next morning I just couldn't get my mind off what I did last night, my cock was already hard again at the thought of my gran. I could hear her moving about  and could smell breakfast being prepared for me, I had to get rid of this hard on before I got up and it didn't take long before I was shooting another huge load while thinking of gran. I cleaned myself up, put on my bathroom and went downstars, gran was in the kitchen. "good morning sweetie, did you sleep well". "good morning gran,yes, very well thanks". gran was also wearing her bath robe and for what I could make out it soon became clear that she had been for a shower already and wasn't wearing anything under it, once again my cock was standing to attention, I was feeling so guilty. gran served breakfast and went on to say that she was very grateful to me for staying with her for the past few weeks and even more so for going in to town with her later to day, she said she had a little treat in store for me, I almost choked when she said that, right now the only treat I wanted from my dear old gran was to get her in to bed, I felt awfull.

 After breakfast was over I went for a shower, my cock was already hard again at the thought of my little treat. after my shower I went to my room to get ready, gran was already in her's getting herself dressed and shortly we were both downstairs all ready for our day out, gran looking so happy, the most relaxed I had seen her since my grandad had passed away, she was wearing her best clothes, the ones she usally reserved for weddings and the likes, all I could think about was what she was wearing underneath, my mind was going in to overdrive at the thought of my old gran wearing stockings and suspenders and lacy bra and panties, in reality it would be tights and granny underwear. it was about a mile in to town and as it was a nice morning we walked along the side of the river to the town centre, gran holding my arm as though we were on a date, to me, it felt as though I was, my cock bursting out of my trousers. I asked gran what she wanted in town to which she answered, she wanted to buy some new clothes as her wardroab looked very drab and she wanted to tidy herself up a bit, especially with her favourite grandchild's eighteenth birthday dinner coming up soon, once again my thought's turned to stocking and suspender's.

 Soon we were in town and gran led me in to the first of her shops where she tried on a few things, each time asking my opinion, I told her that she looked great in everyting because, right now in my eyes she could have been wearing sackcloth and I would have found her sexy. after three shops and lots of bags full of new clothes it was lunch time, gran took me to a swanky restuarant where we had a lovely lunch with a bottle of wine between us, gran had most of it, we must have taken about two hours over lunch, gran going to great lengths to tell me once more how much she enjoyed me staying with her, each time I looked at her my eyes were undressing her, thinking of her in bed and me making love to her, I felt evil but could not help myself.

 As we left the restuarant gran told me that it was my turn now, her treat, I could have anything I wanted or needed, right now all I wanted and needed was to fuck this dear old lady, my gran. " gran, you don't need to waste your money on me", but she insisted, she said it was a token of her appreciation for all I had done for her, how I had helped her through her difficult time and how I had made her feel better, so in the end I let her buy me a new pair of trainers, much to her insistancce, the most expensive pair in the shop.

 We took a taxi for the short journey home as we were by this time laden down with bags, gran held my hand, I wanted to put my hand on her thigh and run it up her skirt, I hated myself for my thoughts.

 The next two weeks were a series of me wanking myself silly at the thought of the lady I was sharing a house with, my own gran, and then it was my eighteenth birthday, we had arranged a dinner, mum and dad, my sister and her boyriend, gran and I.