Special Panties

"You know I haven't said anything about you borrowing my panties....I figured it was just one of those teenage boy things.....but now you've gone too far!!!! Borrowing my panties is one thing, but jerking off into them and putting them back in my drawer, full of your cum....well that's taking things to another level altogether!!!!"
"I'm sorry Sis....I'll never do it again....give them to me and I'll wash them out for you!!!!"
"Too late little Bro, I put them on before I noticed....but it felt kind of nice....when I get home from school we'll see what we're going to do about this!!!"
"I'll do anything you say Sis!"
"I know you will....I have a lot to think about today!!!!"