So this all happened a few years ago. At the time two of my younger female cousins, who were 20 and 18 at the time, were temporarily living with me while they saved up some money to try to get their own place. We were always close, and in my family it is normal when greeting or saying goodbye to each other to give a kiss on the cheek. Well on quite a few occasions the older if the two would miss and "accidentally" kiss me on the lips and quickly apologize. Well it just kept happening so I took a risk and the next time that she "missed" I would kiss her back. So I did. She looked at me surprised at first,but then she looked at me with a smile and hungry eyes. Later when she got home from work she came to my room. She told me that she had been hoping that I would kiss her back and that when I did it turned her on. She said that she had been thinking about it all day. This led to us making out. While we were kissing I had been grabbing her firm round ass. She said that she was a bit embarrassed, but this was her first time doing anything like this. She said that she never had a boyfriend. She asked me if I could help teach her more so that she could be a good girlfriend when she did find one. Just no real penetration, because she wanted to still be a virgin for her first boyfriend. So I told her that was fine and that she could see and touch my dick if she wanted. She said sure, so I took off my pants and played down on my bed. She sat down next to me and started touching my hard cock and stroking it a bit. I asked her if I could lick and suck on her nipples. She took off her shirt and put her tits in my face. I started gently licking and sucking on her nipples, even gently blowing on them to get them hard and sensitive. She really loved that. I reached down and started gently rubbing her pussy through her panties until she came. Then I asked her if I could eat her pussy, and she nodded. I pulled her soaked panties off and slowly began licking her pussy. I began by licking her from the bottom of her pussy, teasing her hole before licking her clit in slow circles. Every once in a while I would bury my tongue in her pussy and rub her clit with the end of my nose at the same time. After she came I asked her if she would like me to cum on her or in her mouth so she would know what cum tastes like. She said I could cum on her and she would taste it. So I jacked of over her while she played with her pussy. I came on her tits and she rubbed some on her finger and put it it in her mouth. She said that she liked the way it tastes. After that we got dressed and she thanked me for giving her a little bit of experience and that it was the hottest thing that ever happened to her. After that whenever her and her sister would be on the couch with me watching movies they would usually sit on either side of me and we would have a blanket over us. Under the blanket she would put my hand on her ass or on her pussy so I could play with it while her sister was sitting right next to us. She would secretly flash me around the house, and come to my room just to have me suck on her nipples or eat her pussy. I'm sure whoever she is with now is a very happy man who is constantly getting his balls drained.