A few months after their March 1935 wedding, Lotti had emigrated to Palestine with her husband Hans, one of the two sons of Flora and Julius Kaiser-Blüth. Julius and his half-brother Karl owned Mannsbach & Lebach Company on the Lindenstrasse in Cologne, a textile factory that manufactured occupational clothing, until it was “Aryanized” in December 1938. Hans had been an active member of the Zionist youth organization, Blue and White (Blau-Weiss). Studying in Munich and Berlin, he was trained as a mechanical and electrical engineer. Although he had gotten an apprenticeship with the prestigious Deutz Company in Cologne, he could not find work in his profession once the Nazis came to power. Hans did manage to get hired as a commission-only sales representative for Palestine by the MAN (Machine Factory Augsburg–Nuremberg) Company in March 1935, but only after it was clear that he would be emigrating to Palestine.

Lotti met Hans Kaiser-Blüth in a Hebrew class organized by the Zionist movement in Cologne. Hans, unable to find work as an engineer in Germany and, as a committed Zionist, anxious to pursue the ideal of settling in Palestine as a Jewish homeland, had already made immigration plans when he first met Lotti. Within a matter of months Lotti and Hans married and planned their move to Palestine.