Arnold Reiss - Marriage of Arnold and Isabella and Divorce

in Lehmann adress buch Wien I found that in 1912 Arnold Reiss lived as Geschaeftsleiter ( manager ) at isabella s house and Bar Krugerstrasse 3.

And in Lehmann 1913 Isabella is written as Isabella Beer verehelichte ( married with ) Reiss.
So the marriage was i guess in 1913 .
The Divorce
And in 1919 in Lehmann at the Krugerstrasse 3 live Isabella Reiss and Arnold Reiss
But according to Lehmann 1920 Arnold moved to another adress as Kaffeehausbesitzer at the Fleischmarkt 20( from 1921 till 1939 at the Dorotheergasse 7 ) Isabella is in the Krugerstrasse 3.( So i suppose their de facto ( perhaps not yeat de jure ) separation was in 1920 .
In Lehmann 1928 Isabella called Isabella Beer ( in 1942 still ) so perhaps the de jure separation was in 1928 ?