Once every year my family in-law goes on a vacation together. Her parents, uncles, aunts and all the children together in one big vacation home. It's always a really fun week, the only problem is it's really impossible to have sex in a house with so many people. So as we got further into the week we both started to get really horny, especially the Thursday when we went with the whole family to an indoor pool.
I was waiting outside of the changing-rooms for my girl so we could go into the pool. She came out and I saw she was wearing a new bikini. It was red with a white pattern on it and it was tight, really showing off all her curves. She looked around trying to see where I was. When she saw me she smiled and walked towards me. She stood on her toes so her mouth was next to my ear, she whispered "I see you like my new bikini". At that moment I realised my dick had started to become hard the moment she came out of the changing-room. I turned around and quickly went into the water before I got completely hard, for everybody to see through my swim shorts. She kept standing on the edge of the pool, having fun about my reaction. She walked past me to the other end of the pool, making sure I could see her ass swing all the way before jumping into the water. I swum towards her but just before I reached her nephews came out of the changing-room and jumped into the water next to us. The rest of the family followed short after. The whole pool time we didn't get a change to do anything other than a bit of flirting and a quick touch now and again.
At the end of the day we walked back to the changing-rooms, both quite sexual frustrated. Suddenly she started to smile and said "let's go in here" while pulling my arm. She pulled me into a changing-room which is meant for a mother with a baby, it was a bit bigger and it had a dresser in it, meant for changing a diaper. After she locked the door we looked at each other for a short while. While standing there we could hear the pool life around us, the children running around and screaming in the water, the sounds of people changing in the changing-rooms and the people walking past our room searching for a room to change. She broke the moment by giving me a soft kiss. At that moment we couldn't hold back anymore and all the build-up tension from the past days started to come out. We started to make out passionately, her hands running all over my body and mine all over hers. She grasps for air when I grabbed her ass. She pushed me back and pulled down my shorts revealing my rock hard cock. She bended over and wrapped her lips around the head and grabbed my balls with her hand. She sucked it a few times to make sure it was hard and wet and got up to kiss me again. I took off her bikini top and she pulled her bottoms down. The moment her bottoms hit the floor she whispered in my ear "fuck me, come on and fuck me".