Casual night turned into something great. So me and hubby had friends over which was another couple we have known for awhile who we will call Dan and Jess. We were all hanging out having a couple drinks and in the hot tub. I got out to make us a couple more drinks and when I was getting back in for whatever reason Dan smacked my ass as his was getting out to go to the bathroom. I'm not sure why but I moaned a little and said do that again. My hubby looked at me then at Dan and just shrugged his shoulders so Dan smacked my ass again leaving his hand on it as I kinda pushed my butt back. I looked at his wife and she just laughed. So I decided to stand up and push my butt against him. I was thinking what am I doing but also it felt good and everyone was going with it. I then feel Dan kiss the back of my neck and kiss hands are on my waist and reaches up grabbing my tits. I reach behind me rubbing his dick as it's getting harder through his short. I see hubby stand up in hot tub and take his shorts off as Jess is smiling and grabs a hold of his dick. I'm so wet at this point I feel Dan untie my top and I turn around and kiss him. As we are kissing I feel his hand slide down my bikini and rubbing my soaked pussy. I couldn't take it any more and kneel down and slide his shorts off and try to take him all in my mouth as I'm gagging a little. I hear some giggling and then see my hubby walk by and Jess following him both naked walking into the house. Dan then grabs the back of my head shooting cum down my throat. As I stand back up I remove my bottoms and tell him he needs to fuck me. We go inside and I see Jess sitting on the couch as hubby is eating her out. Dan then picks me up and I wrap my legs around him and he sits on the couch as I feel him slide in my and I start to ride his dick. I look over and see hubby pull Jess off the couch puts her on the floor and stays fucking her like I have never seen. I can't take it and start to cum and squirt all over Dan. I fall off him and as I'm watching maybe a min later my hubby pulls out and cums all over her tits and face. Few mins go by and everyone was like did that just happen. This type of this has become normal almost and is amazing.