Originally Posted by The Duck

I see where you are coming from, but. Wrong place to ask man, wrong place.

Originally Posted by Quentin

I'm here to help.

Try Luke 6:41 - 6:42 on for size:

"Why do you look at the speck of sawdust in your brother's eye and pay no attention to the plank in your own eye? How can you say to your brother, 'Brother, let me take the speck out of your eye,' when you yourself fail to see the plank in your own eye? You hypocrite, first take the plank out of your eye, and then you will see clearly to remove the speck from your brother's eye."

(I prefer "log" as the translation over "plank," myself, but this will do in a pinch.)

This is typically cited when there's overt hypocrisy taking place (which would only be the case if your sister smoked weed, too, I suppose) but it is also used in a broader sense to mean something like "don't criticize your brother's foibles when you suffer from greater foibles yourself."

"Let he who is without sin among you cast the first stone" is always a good one to bust out, too.