My brother is going thru ugly divorce, His wife (USAF) is stationed in Germany, she has hired German lawyer. But what I don't get is my brother,ex-wife and children is not german citizens. They are U.S. citizens. So does he have to obey german laws? He is in Washington State staying with our parents, been living there for 6 months and just got a job recently. Doesnt have the money to fight this. The ex-wifes home of record is California. His ex says" If you don't appear in German court he will lose child custody"? (3 children) Is this correct?