Talk to a lawyer, but Florida is very much pro the wife, sorry. From what I've heard from others, you will have to pay alimony for a long-term marriage, which is over 10 years. And they don't care about the affair. So your best course, is to try to get along with her. Have you considered going to a Retrouvaille weekend? check the website, www.helpourmarriage.org for locations and dates. They can really help couples heal the marriage. It worked for me!
