Just read the first chapter of Divorce Remedy TWolf, your wife does not know what she's talking about... A lot of time and money has been put into studying the impact of divorce on children and their parents and the results are not pretty... It's survivable, but the conclusion is that staying togther does a lot less damage.. IF the couple can find the MATURITY to make the marriage a healthy one... Your wife just assumes it will be more of the same... so keep setting an adult example for her to follow and to show her (not tell her, but SHOW her) that you are a husband, a father, and most important... An adult...
