Why do you think that the BATNA is the most important source of power in a negotiation?

Husband and wife are negotiating a separation of their property during a divorce. Husband is an executive with a six-figure income. Wife has always stayed at home and raised the children. The children are now 7 and 13 years old. You are negotiating for wife in her request for spousal support, child support and visitation. Will status affect the negotiation? In what areas? What factors will you focus on as issues that will be influenced by power? What power does wife have? What power does the husband have?