Don't know if this is the right place for this thread but here goes. Our son is thinking divorce. problem is his wife is from California and after living there for 7 years moved here to Michigan for the last 3 years. There is also the matter of our grand daughter who is 5. His wife took the child back to Cal. this week, and it looks like that's it. Who do divorces and child custody work when dealing across states? Does it matter who files first?