We spent a few hours on a bar crawl along the main strip. During this time I have to admit I was feeling fairly ancient compared to the young teens a...nd twenties who surrounded us (and fairly drunk). Kate on the other hand was rather reborn and seemed to hit it off with the youngsters, downing shot after shot.Seeing me feeling left out Maria asked me to help her get the next round in at the bar, where we stayed for the next hour or so deep in conversation. I must admit I was flattered by the. "Come in?" I said.Mom walked in noticing Stef on my lap."My homework is done. I'm working on an elective in making love. It should take a lot of lab hours," Stef said.That is exactly why I love her so much her quirky sense of humor. Mom was covering a laugh as we looked over at her."Sean, didn't you express an interest in learning how to make a few meals in the kitchen?" she asked."Yes, I did," I expressed. "Give me about five minutes for some lab work with my sister?"That caught Stef by. Do you understandthat?'She was frowning hard, trying to take in what I was saying.'But you are a boy. You've got boy bits. I know cos I peaked when wewent swimming in the pool last year and you changed into your swimmingtrunks.'I went redder than ever. My father had given me a 'birds and bees' talkonly a few months previously and I had learned more about the differentplumbing of girls and boys that I cared to think about. It was thelongest conversation that I had had with my father for as long. I gently hold your leg and squeeze firmly before moving on to the apex between your legs. I can feel warmth radiating from you. Your hands are all over my body, under my shirt, over my jeans feeling for my hard cock. We break from the kissing to pull your stockings off, the view of your bare legs leading up to the black underwear concealing your excited pussy is just too tantalising. I lean down and start kissing my way up your legs, sucking on your inner thighs. I lick at the crease right next.