Katie is my step daughter in her final year of high school. Her mother & I got together when she was 8 & 10 years later, she has grown up in to hot young woman. I mean long blond hair, slender, curvaceous body & E size boobs that defy gravity.
I never really took any notice of her in that way until a few months back. I noticed doing the washing, some new bras & panties, that were pretty sexy & grown up looking.
I asked my wife if they were hers & I just hadn't noticed & she said they were Katie's. She decided to buy herself some more grown up clothes.
Katie used to get dressed in the bathroom after a shower. But a couple of months back, started coming out in just a towel, grabbing her clothes out of the laundry basket & then heading off to her room to get dressed.
One night when she went to grab her clothes, her towel came undone & half fell off her. I pretended not to notice & made no mention of it to her. However I did notice she was completely shaved. I also saw her size E boobs for the first time. They just sat there, no sag at all. Just nice & pert.
She quickly covered herself again & ran to her room.
I caught a few glimpses of her new underwear, as she wears baggy singlet tops & loose short shorts around the house. I started taking more notice of her.
One day I had to go to the bathroom, whilst she was in the shower. I announced myself, as we always do, to let her know I was coming in. The shower curtain wasn't pulled across completely & I saw her whole body, naked & wet. I instantly felt a tingle downstairs. I was annoyed at myself for thinking what I was thinking. I mean this girl calls me dad for Christ's sake.
I told her the shower curtain was open & said sorry. Katie just said, 'That's ok dad. Don't stress. I didn't realise it wasn't shut.'
One night I walked through the house to lock the doors before bed. As I walked past her room, I heard heavy breathing coming from there. The lights were off in the hall, so she didn't see me. But her door was slightly open & her bedside light was on.
I couldn't help myself. I looked through the 5-6 inch gap in the door & saw her. Legs spread, playing with herself. I had never really thought of Katie doing that, but there she was, one hand playing with one of her breasts under her t-shirt, whilst the other one worked her pussy & clit.