I masturbated with her underwear

I have a friend I esteem, she is a great person and additionally very beautiful, with her I share university studies. She lives alone, many times I've gone to her house and on one of those visits I realized where she puts the used underwear. Well, on one occasion she left for the weekend but asked me to help her reclaim a package from messenger service and leave it at home, so she left me the keys. I was happy, finally I could snoop around quietly among her things. I went on Saturday before noon, reclaimed the package and went to her house; I entered, left it in the living room and headed to her bedroom. I undressed completely and started checking her drawers, and in the third one I found her underwear, there were threads, bras, g-strings of various colors. I smelled each one, imagining I was smelling her vagina, while I masturbated. After a while I left them as they were and went to look at the dirty laundry basket and there were 5 panties, two type thread and three type thong, I took them out and brought them to bed. I smelled them slowly, each one released such a delicious smell, I masturbated with them, wrapping them around my penis and cleaning my precum with them. The moment came when I couldn't hold it anymore and went to the bathroom and ejaculated in the shower, my semen shot out. I opened the key and erased all trace of ejaculation, left the used panties back where they belonged and verifying that everything was in order I left there I love used feminine underwear.