Her mother was "Polly" Mary Eleanor, (born Dixon) and she called Margaret, "Daisy".

[2] During the war she assisted with occupational therapy and after it she went to work at the Ethleen Palmer's Double Bay studio of the Society of Arts and Crafts.

Oppen did not sketch or fund an image, but she would create embroidery on household items such as tablecloths and aprons.

When she returned to Sydney she led a group who decided to open a branch of the guild in New South Wales.

Every two years the Embroidery Guild of New South Wales has an open competition that is named in her honour as a founding member.