Ping,
I'm suggesting you let the walking battle go. That's one your not going to win. Mother's have it in their mind from the get go that their sons, when they reach certain ages are allowed to do certain things. In her mind she has set an age when they will be allowed to walk to school on their own and do other things.

I know it's hard and you may not think it's the right thing to do but I would unite with her on this. I would show her that I understood and am willing to be a team with her and support the decision to not let them walk from school..etc..

I told you in an earlier post..mother's and their sons. Is this such a big problem that you may be willing to risk a backslide? I personally think you have been doing pretty good in your sitch.

In my sitch that's been a positive for me. My D2, when she acts up, even though my W and I are having problems we are united in what we are trying to teach our daughter and we support each other when dealing with our D.