It doesn't really seem fair to doubt her allegations. None of us were there. Russell's ex-wives also claimed some physical abuse at different times in their relationships (please correct me if I am wrong on that) and he admitted to shoving her (he said this in an interview with People or US magazine or something like that) when things got heated and blamed it on the stress of the show (several months before he died).
The Housewives have the good and bad fortune of being seen like cartoon characters, and this kind of storyline was much too heavy for this show, and handled (by Bravo) really poorly. And this was the re-edited season to be sensitive to Russell's death. I can't imagine what it looked like before they recut. I'm in it for the Turtle Time and the Gretchen Christine Beaute products, domestic violence and drug addiction (Kim) are just not a good match for this show.