I would NOT bite her back, when my son was 1-3 he was a biter and ONE time I bit him back,he is now 15 years old and to this day I feel bad about it even though he bit me so often I looked like I had tiny tatoos of his teeth!
After he was out of the biting stage I worked with toddlers for 8 years and realized that ALL toddlers bite, some out of frustration, some while teething, some to get the reaction from the person they bite. Try to think about when she is biting, sometimes a teether kept in the freezer will help. When she bites tell her we don't bite people, it hurts and tell her what to say if it is frustration or give her something she can bite on if she is just wanting to bite because of teething.
at 12:05 PM on Jun. 19, 2008