Eventually Arno falls for Erika and the two become a couple .
Arno 's relationship with Ela is short lived after his sister - in - law Erika moves in with her two children , Milli and Steffi .
Eventually Arno falls for Erika and the two become a couple .
Arno 's relationship with Ela is short lived after his sister - in - law Erika moves in with her two children , Milli and Steffi .