Daughter's Surprise

I was up late and went downstairs when I saw some lights on. My daughter is living at home instead of the college dorms this semester and she got home late after being out with friends. I came downstairs and she was sitting with her head back on the sofa slouching in her seat. I came around to wake her up to go to bed and couldn't believe my eyes! She's sitting with her knees spread while she sleeps. Her denim skirt had ridden up to her lap and fully exposed is her tiny pink thong. The material was gauze and showed her blonde pubes. the string of her thong was pulled well in between per labia. I was instantly hard and the next few minutes became all lust. I went up to her and got on my knees in front of her to take a deep sniff of her crotch. Her pussy smelled sweet and wonderful. She didn't stir as I sniffed, so I quickly licked the length of her labia. She still didn't move. I gently pulled the crotch of her thong down to loosen the tight string in her lips. As it loosened I gently moved the string with my index finger and went down on her again. I began eating her out. She began to slowly stir and moaned a little. I put my free hand over her mouth and dug my tongue in deeper. I started to slurp on her juices and that woke her up. She began to squirm and scream but I kept my hand on her mouth. until she stopped. She looked wide eyed at me and I went back down on her. I sucked hard on her pussy some more taking in her juices. She instinctively pushed her crotch into my mouth and spread her legs as wide as she could I stuck my tongue out as hard as I could and ran it up and down her lips and clit. She bucked slightly a few times and then started to orgasm. When she stopped I took my hand from her mouth as I leaned back from her pussy. "Dad what are you doing?" she hissed in a whisper looking at me. I didn't say a word, just kept the string of her thong pulled to the side. I knew she used birth control since I paid for it. With my free hand I pulled down my shorts releasing my raging stiff cock. Without a word she just stared down at my rod as I pressed my dick against her pussy lips. She looked back up at me as I looked at her and began to burrow into her pussy. When I was buried up to my balls I leaned into her, gave her a peck on her lips and said "I'm sorry and I love you." I didn't stroke fast but just started a nice slow pumping in and out. Her thong now rested against my shaft and I put my hands under her ass and began helping her thrust into me meeting my strokes. We just kept staring and she bit her upper lip. I could feel her tightening and knew she was about to orgasm. I stayed in deeper and made short hard thrusts until we both came together. I pumped into her until I was finished then pecked her on the lips again. "Thank you" I whispered and she replied back "Oh my God Dad. Why did you do that?" I asked "Are you ok?" and she said "yeah, I'm fine" I slowly withdrew and she tugged her skirt down a little but I could still see her crotch. She leaned forward as I was still on my knees about to get up and she kissed me and said "I love you too Dad." I left her on the sofa and went back upstairs.