Moldenhauer is a very unusual name (even in Germany). Since you're sort of at a dead end with her except for that marriage record to a Copestake in 1948, you really should get a copy of her marriage ceritificate and see what it says. Furthermore, because of the unique surname I think it would be helpful to search Moldenhauers in general to see where they came from in Germany. A dozen or so ended up in the US and the likelihood that they are connected due to the unusual surname means they could be connected. There's a Moldenhauer in the old East of Germany just NW of Berlin...which would have been a good reason for Inga to leave before or during WWII.
Just a thought to knock down a brick wall!
