I found her!
Sara got married to Gerrit Kuin (not Kuim) in Ilpendam on 11 Feb 1926
She was living in Amsterdam prior to her marriage
Gerrit Kuin, profession skipper
Born Ilpendam 20 July 1898
Son of Cornelis Kuin and Charlotte Gepke Lina Koch
They had a son Cornelis (Keese?), born in Ilpendam on 16 Oct 1934
Population registration (census) / family card Ilpendam 1924 – 1939 :http://www.waterlandsarchief.nl/index2.php?Itemid=185&op...
There is a rear side of the card, just click on the 2 in the bottom right hand side
marriage Ilpendam 11 Feb 1926https://familysearch.org/pal:/MM9.3.1/TH-1-19132-2618-28?cc=...
image 99 - 104
According to http://www.myheritage.nl/person-11001907_144110712_144110712...
she died in Ilpendam on 22 May 1986, husband Gerrit Kuin died in Ilpendam on 25 Dec 1965