Adultery is the leading cause of divorce, but that is only if you catch them. We use many different methods to catch cheaters: We use GPS units to track their every movement. We use hidden cameras to record what goes on while you aren't at home. We use surveillance of the cheater to document what and who he's doing. We get all the evidence we can to use against the cheater in court.
In a divorce usually the most important issue is who is going to get custody of the children. We have spent hundreds if not thousands, of hours watching and videoing unfit fathers and mothers. We use their actions against them in court. Such actions include drinking around the children, abusing the children, having overnight guests while the children are present and on and on. Drugs are also an important issue in child custody. Alot of our custody cases involve parents that have been divorced for years and the non-custodial parent doesn't feel like the custodial parent is doing the right things - we find out. This does include fathers too. We have been very successful in getting fathers' custody.