Cousins New Bikini Got Me My First Full View

I have two younger female cousins. One summer when we visited my aunt, my parents bought both of them new bikinis. We were still trying to figure out where to put our luggage and saying our initial greetings, when both of them immediately went into their room to put their gifts on, to show us if they fit. The older cousin, lets call her Samantha, was a nice sight, as she had already begun to develop some breasts, but this story is about the younger cousin, naming her Sarah will suffice. Anyway, the whole family being in the room, my mother started to ask if the bikinis fit and if they liked it. Samantha said that it fit very well and that they were beautiful. Sarah, being the more active type of the two, hopped around the place in enjoyment and standing right next to me, started to pull the front side of the bikini bottom away from her to indicate how much space she still got. While she was doing that I got a good view. Me, not knowing what to say or do, tried to look away but nobody seemed to bother with Sarah's behavior. Than I suddenly had a thought. To this day I do not know how or why it struck me. Thinking about the fact that I only saw my neighbor naked once by accident, who was the same age as I am, and never really having the urge to investigate the female body till that day, it might simply be hormones kicking in a bit too late. I don`t know. Samantha was already back in her room changing back to normal clothes, Sarah went to the bedroom of my aunt and I followed her. Closing the door behind me, I asked her what she did back there. She pulled at her bikini bottom again and explained that she still could grow a good bit before it would not fit any longer. I told her that her method was not right, as she would not just grow at the front but all around. Putting my thumbs at the right and left front corners of the bikini bottom and my index fingers at the back, I spread the bottom in all four directions. I told her, that this would be a better way to see how much she still could grow. She giggled and said yes, but mentioned that the same would apply to her legs, while bending over and trying to spread the bottom parts as well. I now had an even better look at her pussy, which I guess was the last indicator before I decided to carry on. Nodding in agreement and still spreading the bottom, I simply pulled them down. Sarah was standing in front of me, just her bikini top on and started to giggle again. I said that she had to change anyway, trying to justify why I pulled them down, but she merely objected that her clothes were in the other room. She was not any bit bothering to cover up nor did she feel uncomfortable. I grinned at her and told her to get them. She pulled her bikini bottom up again and said that she would be back in a second. Sarah came back with a top, a skirt and her undies. Throwing them on the bed, which was not even a metre away from the door, she started to pull her bikini top off. In the meantime I pulled down her bottoms again. Now she was standing nude in front of me. My penis started to pulse and I was getting a bit hot. Before she grabbed her undies I grabbed her and pulled her towards me. I was now sitting in front of the door, to prevent anyone from opening it. My face was directly in front of her pussy. I put my hands on her hips and using my thumbs spread her lips apart. This was the first time I saw a nude girl intentionally and I was already looking deep into her. My mind went crazy. She was only giggling and asking what I was doing. "Playing" was my only answer. I told her to sit down and spread her legs. She simply obeyed. I started to rub all around her pussy even pinched her nipple once. I was in heaven. In the meantime my penis was crying for attention. I did not dare to put a finger inside her, nor did I want to strip down myself, as the family was thinking that we would be back any minute. While that thought hit me, I was starting to get nervous. I did not want to stop exploring, but the idea of getting caught was one I did not want to become real. I told her to get her clothes on. While I was helping her to get her skirt straight and buckling the belt around it - which was just there for decorative reasons, but still was really hard to put on - my father opened the door. Sarah was standing there, topless, her skirt still open at the front, and I was fumbling at it. I thought I was done for. Game Over. My father to my surprise just asked what was keeping us that long. Thank god I managed to stammer words like "belt... hard... can't put on" and thankfully Sarah agreed with me on the spot and told my father that she needed the help and that I was around. "Don`t take too long, dinner is ready" were the last words I heard from my father before he closed the door. I was safe! And till today I do not believe that he was suspecting anything. While we were leaving the room, Sarah mentioned casually, that I should wash my hands. Me asking stupidly why she just replied that pee was coming out of her vagina, and washing your hands after touching it, was something everybody should do. I laughed at her naivety, and went into the bathroom, but took a bit longer, for obvious reasons, as something still needed a bit of attention. Samantha got hold of me before I entered the living room to join the dinner table and whispered in my ear: "I saw through the keyhole what you two did!". I was shocked, but managed to keep a straight face and replied that it better stayed a secret between us. She just nodded and went for dinner. More to follow.