Caught with Cousin's Panties

This happened the summer I turned 16.  My cousin was a year older than me when this happened. It was summer time and I was over at my aunt and uncle's place and we were swimming in their pool and just hanging out. It was me, my 2 younger brothers and sister and my cousin along with her mom (my aunt) and my mom. My cousin and I had been really close growing up since our moms were sisters and we hung out quite a bit especially in the summer. We would spend countless hours at each other's houses and have sleepovers. Nothing sexual had ever happened at any of the previous sleepovers until this one. It was getting late and my cousin and I were out swimming in her pool when we decided to have a sleepover at her house.  We asked and it was ok with our parents. After swimming for a while I had to go use the bathroom so I dried off and went inside and walked into the bathroom.  I had just started to go when I looked over and saw the pair of panties that my cousin had on right before she changed into her bikini. I had started to notice while we were swimming how hot my cousin was and how she was changing from a girl to a woman. 

I picked the panties up and sniffed them and got hard thinking of her and how she probably played with herself when she was alone. I guess I was gone longer than I thought because the next thing I know, the door flew open and to my surprise it was my cousin. She saw me with a hard on and her panties in my hand and asked me what I was doing. I tried to lie but it was no use and I confessed almost immediately. She told me to follow her to her room and locked the door, then told me to strip and to keep going. Luckily for us everyone was still outside. At this point I was a little nervous because her and I hadn't seen each other naked since we were kids when we would take a bath together at Grandma's house. 

I started to get naked beginning with my shirt and she said to take my pants off next or else she would tell her mom and my mom what she saw.  Seeing no choice, I took my swim trunks off and revealed my penis. She then handed me the panties I was sniffing earlier and told me to continue what I was doing. I tried to but I couldn't get hard so she offered to help by taking her bikini top off.  It did help a little.  But even better, she stepped out of her bikini bottoms and I instantly got hard. I started playing with myself even more when she reached over and put her hand on my dick slowly stroking it up and down. I told her how good that felt. She proceeded to take my hand and put it on her boobs so I started to rub and play with them. I eventually took one in my mouth and sucked on it. She quickly took my hand and directed it towards her clit. Finding it, I started to rub and play with it too. She was getting so wet and she started moaning and telling me how good it felt.  I was finger fucking her and she was jacking me off and as we were both getting close to orgasm she told me to cum in the panties. As I blew my load, I put the panties in front of my cock and came inside of them. She came at the same time. 

Relieved and flushed with orgasmic after glow, we then got dressed and went back outside with everyone.  Later that night we played around some more and played doctor. 

(Sadly this is all a fantasy, but I would have loved to play doctor with her then and still.)