A Beautiful Scene

I am blessed with a wonderful daughter who I am close to. A few years ago when she was a senior in high school, and 18 years old, we had a big snow storm. I was up early to get to work and her school called to announce they were closed for the day. In the past, I go down and unplug her alarm clock so she doesn't get up, kiss her on the forehead and whisper I love her when school is cancelled. I built her a really nice spread in our basement. So I headed down stairs as normal when school is cancelled and started to walk into her room (she often left her door open to go from her bedroom to finished part of basement as the downstairs was like her own little apartment. I was being quiet trying not to wake her. What happened next I will never forget. I approached her door when I noticed she was naked and masturbating. The head board was on same wall as the door and although I couldn't see her face I could see her body. I stopped for a second flustered as I had not grasped my daughter had developed to the age she was a sexual being. Her night shirt was pushed up with her left hand playing with her nipples and her right hand playing with her pussy. I also had not realized she had developed a nice body (she was a swimmer) and definitely was not a little girl. I stepped back for a second confused. I stood on the wall and watched as she was really working her clit and was to far into bliss to realize I was there. She kept her one hand on her breast enjoying her nipples. It was obvious this was not her first time. I wanted to leave but I couldn't it was so beautiful watching a young woman really enjoy herself. I felt myself get hard and felt funny. I could see her legs fully spread and her working herself like a pro. I could tell she close by her sounds when I saw her stomach start to twitch - I was shocked when she let out a oh fuck as she was about to cum - I had never heard her cuss before. My baby girl was orgasming right before my eyes and it was so beautiful. As she was coming down I quietly walked back upstairs. A couple of minutes later she came upstairs with her traditional good morning Daddy and peck on the cheek. I told her school was cancelled and she said great she could go back to bed. I told her sorry I didn't unplug your alarm clock I got busy and lost track of time. She said it was fine and headed back down stairs. I was confused. I just had never thought of her as growing into a sexual being. It was a total surprise what I stumbled upon. I was proud of her in a weird way. It was obvious she knew what she was doing. Then the feelings of being turned on - no I didn't want to touch her or anything like that but seeing what a beautiful body she had and a seeing a young woman beautiful masturbation session with a beautiful orgasm. I couldn't help but become aroused. I just suppressed these feelings and Ignored them as long as possible until one night while showering and my mind drifted to seeing her. I became hard and couldn't stop - I closed my eyes and remembered so vividly her. I was dreaming I was stroking right outside her door watching her. I tried to stop thinking about it but I couldn't before long I was stroking hard matching the remembrance of the speed she was playing with herself. It wasn't long when I felt much built up and as much as I tried not to cum thinking of my daughter masturbating it was to late. It felt so good I had not realized how much I had suppressed the feelings of being aroused by watching her until I exploded in pleasure