Two things: I want to gently disagree with the pp'er and just say that if your mother is able to take a step back, and be objective, then she will be a fine doula. A loving and dedicated heart is more important than tons of experience, especially if she's willing to read up on some relaxation and pain management techniques. A doula doesn't have to be a stranger, just someone who is solely there for your comfort and support. Now, if your mother is the type to shriek and scream and hyperventilate that her baby is in pain the first time you get a hard contraction, THEN, she's being your mother, not your doula (I've seen it, unfortunately...) But if she's able to put that aside, then she may be the best doula, because she knows you already, and probably many of your comforts.
Also agreeing with the birth partner book, but wanted to say if she's willing to watch videos, that can be a huge help. My DH had read many articles, chapters, etc, but he didn't "get it" until we sat down and watched a birth movie together, and he realized how different my idea of an ideal and totally attainable birth was, compared to the stereotypical birth people see. If she will, I highly highly recommend Birth As We Know it. It makes me melt, and I think could convince just about anything into natural and peaceful birth.
