Kausel is a very, very unusual name in Germany. there are just 4 entries in teh German telephone book, three of them in the same place.

http://www.dastelefonbuch.de/

Just enter Kausel on the left and you will see their names and addresses. I suggest you write to those 4 people and ask about that woman.

Even if you know the place where Grete Marie was born you only obtain the birth record if you were a direct descendant due to data protection.

Gaby