From The Detroit Free Press, January 19, 1918:
ROBINSON--At residence 799 Wabash ave., Sarah Robinson, beloved mother of Wesley Robinson, aged 86 years. Funeral Saturday 1 p.m. from residence, to vault at Woodmere cemetery.
William, Sarah and Wesley Robinson in 1900, living on Wabash Avenue in Detroit. Sarah had 2 living children in 1900.
Sarah's death record can be seen online here. Place of burial appears to be Perrinsville, Mich. on the record.