My wife and I have a 15 yr old daughter. She decided to do a science project on sperm. She is really hot for my own daughter. Always in her panties. Sometimes she watches TV with us and I've seen her pretty pink slit. Looks really tasty. My wife saw me looking at her. She told me to help with the project. So I got my daughter to milk my cock for a little precum. That lasted a few samples. She said she needed a little more. This time I made her work for it. My wife said she wanted to watch. So I got her naked and made her sit on the couch. She was kinda wet anyway witch made it easy. She laid back and I rubbed my hard cock up and her tight pussy. She was tickleish at first but mom told her relax. Pushing my cock in just to the ridge of the head. My wife wouldn't let me take her cherry. So my suggested that if I don't push in any farther I can't get her pregnant. So I got the message. My wife wants me to cum inside her tight pussy lips. She can get the sperm from her little snatch. So she got an A on the project of course. And I was still cumming in her almost every night. She really likes to swallow now. Dam I'm a good teacher wish I had 3 daughters. Gotta give my little girl her treat.