With my sister-in-law's thong... part 1

I currently live in BSAS, I've been dating for 3 years, my girlfriend lives with her sister, my girlfriend is 25 and my sister-in-law is 23, they live together since they're from the interior of the country and came to study in the capital. My younger and more annoying sister-in-law always wears tight pants and leggings, every time she goes out, her whole booty gets marked like that, it makes me leave my cock whenever I see her with those thongs on her tiny ass. I had to think about how to smell those thongs have them with me. So last weekend I arrived earlier at my girlfriend's house and went where they leave all the dirty laundry from the week and YES YES YES there were several thongs for me to take with me, so I chose the black one and put it in my pocket, took it home the next day and smelled that thong had a pussy well hot...put it in my mouth...in my cock and feel that thong in my mouth can't be explained...filled it with cum during the week and then after a few days took it back to my girlfriend's house...so I put it away where they wash it...will continue...next photos of the thong...