Watch Weeds Free Episodes online

I have never seen the first season and I am just now watching the 2nd on DVD. Are Nancy and Andy actually brother and sister? and why is Doug even involved? Who is he? (funny as hell though! haha)

This article on Yahoo certainly seems to be suggesting that:
http://news.yahoo.com/s/ap/20080804/ap_on_en_mo/heath_ledger;_ylt=AneOkWrywYk_y4EhRt0Fr9cazJV4
How could they miss pointing out that her character on “weeds” is a drug dealer who can’t seem to keep her boyfriend’s best interests at heart?