I always thought D Q's mother was Moc Niem Tu, but according to this article..
Duong Qua's, (main character for "The Condor Lovers") mother (in the book, they changed it, he had a different mother, not Moc Niem Tu who was in love with the main evil guy in LOCH) was in love with Quach Tinh, and although he knew that he didn't love her, she still loved him to the very end. And lastly, Moc Niem Tu, she was so in love with Duong Khang that when he died she committed suicide (in the book), but on the other hand the guys weren't like that.
http://www.spcnet.tv/article_love.shtml
and...
know that Quach Tinh only loved Hoang Dimg but what about Duong Khang, he loved Moc Niem Tu, but when he realised that she isn't going to be with him unless he left all his riches and kill his adopted father, he decided that he didn't love her any more, so he went and liked Duong Qua's real mother, Tan Nam Cam.
i'm lost