This happened when I was about 30. My wife never let me do oral with her, and it was something I really wanted to do. I had never done this with any woman, or girl when younger, so I really wanted to eat out someone. My wife's 13yo little sister was over spending the weekend, and was sleeping on the fold out sofa. I woke up in the night, around 3 am, and went to the kitchen to get some water. On the way back to my room, I saw my tiny little sister-in-law, sleeping with the covers trown off. Her PJ top was unbuttoned to the last button at her tummy. I could see those tiny titts, about 30 b cup, so I went over and set down on the bed next to her. I started playing with her, and then undid the last button, and spread her top open. I then bent down and started kissing and sucking on those little things, taking all of each into my mouth, first one then the other. She was moning in her sleep, and I thought, maybe this is my chance to get to eat out a pussy. I slowly started kissing my way down her tummy, to the top of her PJ bottoms. I slid them down slowly so as not to wake her, and found her tiny littly pussy, just starting to grow a little hair. As I started licking up and down through her slit, finding her button come out, I started licking and then sucking on it. It didn't take long, and she was soooo wet, and I started tounge fucking her. All of a sudden her legs clamped my face into her pussy, and I knew she was either awake or just about to wake up. She was bucking up to meet my thrusting tounge, and soon came in a big way. As her legs loosened from my face, I started kissing back up her body, getting those little tits again, then went to her lips. She started kissing me back, I knew she was awake, and whispered in her ear, what else do you want tonight?? Without saying a word, she reached down, un did the belt on my bathrobe, and took my hard 7 inch dick in her hand, guiding it to her pussy. Thinking she was still a virigin, I slowly started sliding into her. To my surprise, she just bucked up to me, sliding me all the way inside. I fucked her for the next 25 minutes, and came deep inside of her. We talked after, and she said that she had fucked 3 boys before, and that now she had fucked a MAN, and was glad to find out that she could take a real man's dick. That weekend we fucked 3 more times, and now she is expecting my child. She is putting the blame on one of her boyfriends, he is 19, and just got arrested for having sex with a minor. Every time she comes over for the weekend now, I get to eat her pussy, and fuck her, and will continue to. She said she will never stop or tell, because she loves me more than her sister does. I felt guilty at first, but now 6 months later, I just enjoy her tiny little girl pussy. Did not know how this would turn out back then, but over the years, after her mother kicked her out, she has lived with us. We helped her raise her daughter, and now years later, my wife has died, and she is still living with me. You can say what you want, but I still love her, and we still fuck together. She has not had any more kids, and she helped me raise my 2 kids.