(This was originally filmed as a custom video and the name Chris is used) You're caught off guard and embarrassed when your sister comes home from the gym one day and finds you in her bedroom, going through her laundry and sniffing her dirty panties! She makes you admit that you like the sweaty smell of her panties after she's been working out, particularly the ass smell, and though you're expecting her to be mad at you she actually seems amused! She teases you for a bit and then admits she's actually kind of turned on by the idea of you smelling her panties in secret! She asks if you'd like to smell the real thing and to your surprise starts stripping off, before bending over and pushing her ass into your face, letting you smell how hot and sweaty she got in the gym! She teases you about how she can see your cock getting hard, then asks if you'd like to do more than just smell her.. Of course you say yes and she makes you thank her for being the best big sister before letting you fuck her tight and sweaty asshole! She begs you to pound her harder and deeper until you can't hold it anymore and you fill her ass with cum, watching as it dribbles out afterwards!