Distraction

-- Have you finished your homework?

-- Do you really expect me to be able to concentrate on math problems with my uber sexy stepmom lying in my bed naked??

-- So, it's my fault you're getting bad grades?

-- Let's just say you're a contributing factor...

-- Dad will really get angry if you fail another class.

-- Not half as angry as if he were to find out what we're doing behind his back.

-- Don't even joke about it.