On 22 April 1916, she married coal miner Ronald Emlyn Green, and despite being a well-regarded teacher, she was forced out of her job due to the United Kingdom's marriage bar.

[4] Similarly to other female Labour activists in South Wales, Green "did not call for radical transformation of gender roles in society.

With much of its success attributed directly to Green, the league had organised into a social club by the following year, with an annual membership subscription and regular events.

During the lockout, Green began fundraising for the Women's Committee for the Relief of Miners' Wives and Children (WCRMWC), which was later described as an "industrial Red Cross".

[7] As part of the effort to relieve the economic strain on the town, Green and Elizabeth Andrews headed a program which temporarily fostered 2,500 vulnerable children from communities across the South Wales Coalfield for the duration of the lockout, easing "the financial burden on their parents".

[4][7] The pair personally led a group of fifty children from Abertillery, as well as the nearby towns of Dowlais and Merthyr Tydfil, directly to foster families in London.

The group travelled thousands of miles via rail between Leningrad and Tbilisi, visiting "workplaces, clubs, hospitals and schools and exploring many aspects of Soviet life".

[4][7] Though she conceded that there were serious issues in regions like Azerbaijan, where "male opposition to the new equality laws created serious tension and violence", she also broadly praised the Muslim-majority areas, claiming that Muslim women had gained their own identities.

[4][7] Despite this loss, Green continued her activism, writing frequent columns in the Labour Woman, particularly about issues relating to child care and motherhood.

The words were those of a working-class woman who knew of the problems surrounding child rearing at a time when economic difficulties ensured there were shortages of all kinds".