I just ran Marian Knox's name on the Houston voter registration database. She is an active partisan Democrat. She's voted in every Democrat primary except for one since 1994 (the oldest records I have) and that year she didn't vote.
Is this the same Marian Knox? The first link shows a campaign contribution of $5.00 (wow), the second is a description of the state legislator to whom the the donation was made. It turns out she is a Republican. Verification anyone?
http://204.65.203.2/public/185841.pdf
http://www.house.state.tx.us/members/dist134/bio/wong.htm