Book excerpt: It's one of the oldest triangles: mother-in-law, daughter-in-law and the son/husband trapped in between. Now, Susan Barash gives readers the tools to better understand the insecurities, generational jealousies and power struggles that are inherent in these relationships. Combining candid accounts from real mothers-in-law and daughters-in-law with sound advice from noted psychologists and counselors, Barash gives insight into this complex dynamic and shows readers how to create mutually independent and rewarding relationships that allow mothers-in-law, daughters-in-law and sons/husbands to grow.