Comtesse de Rose, mother of Robert Delaunay, was a regular visitor to Uhde's gallery, sometimes accompanied by her son. Sonia Terk met Robert Delaunay in early 1909. They became lovers in April of that year and it was decided that she and Uhde should divorce. The divorce was finalised in August 1910. Sonia was pregnant and she and Robert married on 15 November 1910. Their son Charles was born on January 18, 1911. They were supported by an allowance sent from Sonia's aunt in St. Petersburg.