So to start off, this is shared account between me- Noah (30) and my partner Lily (25). We are both sluts simply put. We live the full swinging experience and have been since a year into our now six year relationship. So one evening on a double dinner date with lilys older sister and her boyfriend we ended up drinking much more than we expected after playing Mexican train for hours. I don’t remember whose idea it initially was (obviously mine) but someone suggested a soak in the hot tub. Keep in mind this is still unintentional and innocent at this point, so we decide to skinny dip like adults. We all shyly get in, lilys sister trying to hide herself with her hands as she gets in was funny. After a few more shots we are all in that perfect pocket of wasted,where we were all aware and coherent but just pickled enough to lower our inhibitions decide to get in the pool and chicken fight, Lilly on me, her sister atop her boyfriend. It was a disaster, but what stopped it was a grab from Lilly’s sister on my dick “accidentally” when she fell off, we joked for a few minutes and Lilly said the only fair solution was she had to grab the bfs….he was hesitant but after reassurance from all of us he agreed, this is when lily decides to be funny and gives it a couple tugs. He gets hard almost immediately, we all chuckle a little but know he’s embarrassed so I do what any good man would and got hard myself in support. They are shocked, Lilly’s sister gasp a little upon my erect reveal mainly cause I’m a grower and like a tree trunk it grows. So now we’re standing in water while me and the bf are hard as diamonds silent. I break it by complimenting him on his piece in a half joke way and that’s when he says “you’ve got a unit yourself, I have no idea how Lilly does that but impressive there’s no way (her sisters name) could haha”. game on. We all get barely dressed and start to play cards on the sofa. The whole time the three of them bicker over if the sister could or not. That’s when I catch her starting at my bulge balantly ogling. She stands up and says she needs to see it hard again to settle the debate. So Lilly gets me hard and calls them both back. I’m not sure what happened but I saw the sister looking like she never had or I hadn’t notice. the long sun bleached hair, tanned skin blue eyes, and tits that were much nicer than Lilly’s suddenly drove me wild. Just as before they are all standing and staring at my hard cock, this time the now tantalizing sister asks if she can grab it to get the real sense of girth. We all agree and away she goes, when she grips what she’s able to fit my cock pulse’s noticeably. She man handles it a little too long and her bf jokingly says she might as well just suck it too. Boom! She without hesitation kneels and stuff her mouth with my throbbing cock for about 5 seconds before getting stopped by her man. We’re all speechless when Lilly says “she’s open to trading for the night seeing as it’s already been in her mouth” they talk quietly for a few moments then agree. We all strip again and start rubbing our hands on the new partner, the sister immediately grabs my cock and strokes, that when I see bf sucking Lilly’s tits while she kissses his neck. That’s when he scoops Lilly up and into a bedroom. Her sister starts telling me how badly she needs to be fucked by my cock. She bends over and proceeds to absolutely destroy me with her mouth. Spit dripping everywhere, tears in her eyes as she twirls her tongue around my tip, one hand stroking my shaft while the other massages my taint. I’m fighting cumming already and decide to pull her up grab her waist, lay back and sit her on my face. She’s riding while my mouth flicks and sucks on her pink perfect pussy. She starts moaning my name and begging me to not stop, which turned into screams of “I’m cumming and can’t stop, I’m gunna squirt” which she does into my mouth. She get off and I grab her head down and spit her squirt into her mouth. We hear Lilly savagely screaming “fuck my ass harder, yes, Jesus fuck”. Pt2 to follow