My step-sister walked into my room one day and she says, "Hey, big brother... take off my shirt."

So I took off her shirt.

Then she says, "Take off my skirt..."

So I took off her skirt.

Then she says, "Take off my bra and panties..."

So I took off her bra and panties.

Then she says, "If I ever catch you wearing my clothes again, I'm telling mom and dad!"