I walked into my bedroom and caught my stepson red handed smelling my dirty thong. I was so upset that I decided to punish him by making him get behind my huge 210 pound ass and smell my dirty thong while it's up against my dirty ass. As he sniffed, he begged for me to stop, but that only made me want to make him smell even more. I opened my big ass cheeks even more and made him stick his nose in further and then I let go of my ass cheeks and trapped his nose in my ass for even longer. After that I took off my dirty thong and made held it up to his nose and made him smell it even longer. He caught smells of farts, and other things that had recently come out of this ass and while embarrassed at first, admitted he enjoyed smells from older women. I might have been upset at first, but in the end I was so turned on by my stepson, that I admitted to him that he's more than welcome to sniff my dirty undies and dirty ass in the future anytime.