Everyone super casual in shorts, bikini tops, just lounging. Did I mention drinking? For every beer, a little inhibition left the area with it. My wif... and I flirted across the yard. She had a bikini top under a button-up shirt that was unbuttoned. Her nipples—my favorite part of her luscious body—were perky all day and my cock was definitely noticing. Over there was her slightly older sister wearing just a bikini top and super short-shorts. We'd always flirted and if it weren't for my general. ..put your mouth on my dick right now and shut up." So, of course, just like the good little girl she was, she unzipped my pants as I leaned back in my seat, and she began to suck me with an enthusiasm I haven't often encountered.As I began to moan with pleasure, Katherine began to go DEEP. I mean, she was all the way down to my balls and then some. I couldn't believe it....this chick must have been a sword swallower in a former life, because she had NO gag reflex. It felt SO unbelievably. I hung my swim suit up on the hook and continued with my shower. I then turned to look at Casey. She looked at me in a very seductive way straight in my eyes, like a girlfriend does when she gives a man a blow job. She then turned her body and started to peel off her swim suit, it was like my own private show. As her swim suit came off, I saw her magnificent teen age body revealed to me. First her small perky breasts, then her white flat stomach and at last she pulled her swim suit completely. From that point, many nights were spent in each other's arms. Less clothing was worn each time. Both virgins at the time, we decided to try it out with each other. We took turns fingering and going down on each other, me sucking her clit and Sarah licking deep inside me. This went on for a while, until we drifted apart.Fast forward a few years. We'd both moved out, lived in different cities, but we decided to start hanging out again. Sarah came to stay with me on a few weekends. We would drink.