How my daughter seduced me

My name is Sarah, I’m 15 years old, I have a sister Julie, she is 13, and a brother, David, he is 9, mom is a supervisor at the supermarket and dad is a landscape gardener designer, and works at home a lot, leaving the day to day work to his team of worker.
For the last 3 years or so I have had growing feeling towards my daddy, I’ve lay in bed fingering myself thinking about him..
This all started when I came home from school early one afternoon, dad wasn’t in the downstairs room so I thought he was in his office in the attic, as I needed to ask him something I went up looking for him, when I reached the top of the stairs I froze, and had to bite my hand to stop him hearing my gasp, daddy was completely naked coming out of the bathroom drying his hair, my eyes were fixed on his penis which was sticking right out in front of him, as he walked it bobbed a little, it looked so huge, but then to a 12 year old it would, when he had entered his room I quickly ran down stairs and out into the garden and climbed up into the tree house he had built for me and my siblings, I had a funny tingling between my legs and I soon found out if I rubbed my vagina it felt better.
I had been rubbing myself for about five minutes when I hared daddy calling me from under the tree house, I wondered how he knew I was home, then I realised my bag and coat was in the kitchen, I looked out, “what are you doing home”?
I had to think quick so I told him I had had a falling out with Tracy again, this was plausible as we were always falling out. “I don’t know why you bother with her, your falling out at the drop of a hat” “I know dad, maybe this time I’ll not make up with her”
I slid down the fireman’s pole and hugged dad, “What’s that for”? “I just felt like it, do you mind”?
He didn’t answer, he just asked if I was hungry, minutes later he was making me a sandwich, as we ate I asked him if I could have my ears pierced, he agreed as long as mom was happy with me having it done, which I knew she would let me as I had already asked her.
Over the following few months I couldn’t get the thought of seeing dad’s hard penis out of my mind and I found myself rubbing my vagina as I lay in bed, most night’s.
As I became more experienced in doing this I could give myself several orgasms, not that I knew what they were for a few years, all I knew was how good I felt afterwards.
As the year passed and I learned more about sex I grew to love my daddy more and more. For my 15th birthday he asked what I wanted to do, I asked if I cold go to the theatre, being my treat I could chose what we saw, mom and my sister and brother didn’t go with us, so it felt like I was on a date with my daddy, I would hug his arm thanking him for this treat.
After the show he drove us home, we arrived after 2 in the morning, to his surprise mom was still up watching a girly film she had borrowed off her sister, as we walked into the lounge she looked back in surprise seeing us, “I thought you would make a night of it and stop over at a hotel to save the drive home”
Hearing dad replying “I did think about it but we didn’t have a change of clothes or night wear with us” I could have screamed, to be alone and possibly naked with my daddy, would have been the icing on the cake.
Once I was in bed my fingers were working double time in my pussy and the orgasm I had was better than any before.
The following morning I stayed in bed until mid morning, I could here dad mowing the lawn and looked out of my window, he was wearing just his working trousers, his muscles flexed and relaxed as he moved the mower around the lawn, I knew mom would be at work and guessed that Julie and David would be out playing with their friends, I quickly washed and started to dress, as I pulled my bra on I had the idea of leaving it off, and maybe my nipple would harden and daddy might see, so this was put back in my draw, then I had the wicked idea to leave my panties off also.