When she says it like that...

Hearing my sister speak like that, purposefully in an erotic context, I couldn't find it in me to deny her. For the first time, I tasted my own nut as I licked her smelly feet. I heard my sister moan lightly. "That's right, big brother." She said. "Lick your nut from my dirty feet."

Consuming the slightly bitter cum from her soles was unbelievably arousing to me. Submitting like this to my little sister was super hot. When I had cleaned her foot, she pulled it away from me. She looked at me with her big eyes and said, "Thanks big bro!" She then grabbed her socks and said, "I have to go to bed before mom actually falls asleep.. but here's a gift for you to smell overnight." As she said it she held her sweaty socks under my nose. She then spoke once again in her bratty voice. "I want you to smell my socks and think of my feet all night, big bro." She said.

And like I said already, I couldn't help but listen when she talked like that. As she walked out the door and looked back at me with an impish grin, I smiled while inhaling her unbelievably stinky sock.