My then girlfriend wanted to visit her sister across the country. I had some time off to use at work so I figured I would tag along and see what Miami is really like. A week of beaches sounds great. Well my girlfriend had a whole bunch of plans made with her sister and I said that was fine, as I don't mind alone time. Plus there will be time for us.
When we arrived the first day it was midday and they greeted each other as sisters do. Her sister was in a bikini, flip flops and a hat, ready for the beach. I tried not to stare too much but with them preoccupied I could absorb her sister's beauty too. She also had a french tip toes which were my favorite and I got excited staring at her pretty feet. They were bigger than my gf's but also slightly prettier. I greeted her as well and said I had plans tonight so they can catch up. It was a lie because I wanted my girlfriend to not worry about me. Shortly after we unpacked and settled in her guest room my gf got ready to leave. She looked even better than her sister and I couldn't wait until she got back tonight.
After they left I had the place to myself so I decided to start with some beers from her fridge. After the first drink I got really horny, and after three more I needed relief. I wandered into her sister's room. I was thinking about her feet and fantasizing about worshiping them. I convinced myself it wasn't cheating or anything to just smell her shoes or socks. In her room I found her walk in closet and it was cluttered with old clothes and shoes. I got on the floor and started sniffing her trainers. They must've been brand new because there wasn't any scent. The whole act of sniffing made me feel even hornier because I was doing something taboo. I found some other shoes, but I could barely smell anything at all, just shoe. I looked for some socks on the floor but couldn't find anything.
When I left the closet I saw a laundry bin behind the door. I started to skim off the top to find some socks but the first thing I found were some blue panties, with some slight stains. I figured since I already came this far I'll give them a sniff. It smelled so strong and knowing it was her aroma I got immediately hard. I decided to take them to the bathroom and blow a load or a couple. Just this one time was fine and no one would know.
I took them to the bathroom and immediately put them on my face. I wore it like a mask breathing in the odor. I've never got this hard before and I threw my pants down and started beating my dick. I wanted to enjoy it and keep going but the smell was so strong and the situation was so taboo that I started cumming sooner than I expected. I aimed towards her bathtub and covered her walls. I had some immediate regret after because I felt like I betrayed my girlfriend but with her sister's panties still on my face, the aroma got me going again. I stripped and laid in the tub. I put some of my cum on the panties and then wrapped it around my dick. I started pumping my fist to fuck my hand and panties. I made sure the dark stain was touching my dick and again I came in like 30 seconds. At this point I was feeling shaky so, I took a quick shower but left the panties on the floor.
After my shower I put the panties back in the hamper, cum and all, knowing it would be cleaned at some point.
Later that night both my girlfriend and her sister returned, fairly tipsy. I too at this point was more than a couple beers in and my gf was ready for bed. That night we both got it on and she was very enthusiastic. I too was thinking about what I did earlier that day and was trying hard not to cum but after five minutes I was about to bust. I pulled out and my gf was wondering what was happening and that's when I went down on her. She tastes like sweat and a little bit of urine but I loved the odor. She smelled almost like her sister, but her sister's panties were more pungent and I was brought back to that smell. I kept going until she came, squeezing my head between her thighs and she said she was tired from a long day. She told me to relax and went down on me. She was amazing with her tongue and I came in a couple of seconds. She swallowed it all and gave me a knowing wink. She knows how to please a man that's for sure. She went to go brush her teeth and I passed out before she got back.
That next morning I was pretty hungover. I woke up to an empty bed. I checked my phone and my gf and her sister were going to do an all day spa trip. I made my way out of bed and to the fridge hoping that there was gatorade or something. There was in fact Pedialyte and I started chugging it heavily.