Luisa Stake 2. In Progress

My great-grandmother was born in Berlin, Germany on January 25, 1890.  Her name was Luisa Stake.  I believe her family likely moved to Chelm, Poland at some point and I know that she married my great-grandfather, Wilhelm Seidlitz (dob Oct. 29, 1891) in Chelm on June 8, 1913 after which they immigrated to the US in April of 1914.   I have no information about her parents or any other of her family members other than she may have had a sister named “Tina or Tena” .  I am fortunate enough to be in possession of her Bible which was written in German.   I am looking for any help at all in discovering more about her early life and family in Europe.