Homesick daughter strokes off Daddy

My daughter heard me banging her mom, now she wants to see my cock! My stepdaughter is home on holiday break from college. She's a cute 18-year old freshman, who has been away from home for her first time ever. She's a bit homesick I think, and has been acting a little bit over-affectionate with me when her mom isn't around. I don't mind, she's become quite an adorable young lady. She has long brown hair, and a pretty face, and the cutest southern drawl when she speaks. The other morning she popped into our bedroom after her mom had already left for work, and I was getting ready to head into the office. I run a large company, and pride myself on being on time, but I couldn't help running a little late to spend a little time with my cute stepdaughter. She was feeling especially needy I think, because she started begging me to play hooky with her and stay home from work! That was something I couldn't do, I have a lot of people depending on me to be at my desk. Oh well, a few minutes wouldn't hurt I suppose. She was acting especially nervous, stuttering and stammering and confessed that she had a little secret that she has wanted to tell me for a while now. She admitted that she had a crush on me! I guess I can understand it, I've always been the strong provider, and you know how girls are with their Daddy's. It's not all that unusual for a young girl to have a crush on her dad, especially her step-dad. This was getting more interesting by the minute. I decided right then and there that I wanted to find out what she was REALLY trying to say to me. I told her that I would stay home. The office could do without me for a day. She was very excited that I decided to play hooky with her. She then, confessed that she had heard my wife making noise in the bedroom! I didn't think she could hear me banging her mom all the way down the hall. I secretly wondered if she had been listening at the door, and for how long? I could feel myself starting to swell in my pants, in a way I never had for my daughter before. She said it excited her to hear us, and stammered out that she was curious about what was causing her mom to make those sounds. Then, my shy little girl came right out and asked if I had a big cock. She then floored me by asking if she could see it! Why not, I thought. She said that her mom wouldn't find out, so as long as she could keep a secret then I was willing to show her my thick cock. I lay down on the bed and let my stepdaughter open up my work slacks and pull them down. This girl was anxious! My cock was already hard as it sprung out of my pants. She took it in her hand and began to stroke it up and down, asking me if I like it when my little girl's hand is around it. She spit on my dick and continued stroking it in a way her Mom never did. It felt amazing. As she stroked my rod, she asked me if I remembered the time I accidently walked in on her as she was changing. She asked if I saw anything, then said she wanted to show me! She took off her silky pajamas and lacy red bra(that I bought for her) and showed me her tight young tits. My cock was leaking pre-cum all over her hand. She continued showing me more of her body, making me more and more aroused. Her smooth pussy looked really good, and she asked me if I wanted to put my cock inside. Hell yes I did! But she said it would be wrong to do that on her mom's bed. She just wanted to make me feel good. She kept stroking and stroking me as I took her other hand and added it to the first, feeling both of her small hands glide over my shaft. I felt a huge orgasm building. She begged me to cum for her, and finally I blew a creamy load all over her hand. As her cum-covered hands continued to lovingly stroke my cock, she reminded me that we had the entire day left and could play even more games.