We had just got back from shopping and my sister-in-law went to take a piss. After she came out I noticed she was wearing white panties. A few minutes later I saw her with a different pair on.
So after everyone went downstairs I went on the computer and looked through her bag to see if I could find the panties. When I found them they were so moist, my cock started getting hard once I started smelling them.
It was actually a pleasant smell. I started rubbing the panties on my cock. Then I just started sniffing them and jerking my cock. It didn't take long before I was cumming. I have always been attracted to my sister-in-law. I've played with her stuff before but this time it went to a whole different level with her pussy moisture on the panties. I hope I can find the panties again today and jerk off again.