Relationship Rx

Dear Readers: I have a wonderful sister-in-law that, due to her own tumultuous childhood, has a difficult time setting limits for her children -- my beautiful niece and nephew. Last time I was with her she talked about this problem. I was understanding but didn't offer any advice. My own thoughts on the matter are....by not setting limits for your child, you're setting him or her up for a very difficult adulthood where the reality of limits and rules is met with extreme frustration and unnecessary conflict. I believe a child could develop a narcissistic personality based on this parenting. Should I tell my sister-in-law my thoughts or butt out? --George